Goodwill and Intangible Assets Disclosure [Abstract]
Amortizable Intangible Assets
Intangible Assets Disclosure [Text Block]
Disclosure of Restrictions on Dividends, Loans and Advances Disclosure [Abstract]
Dividend Restrictions [Table]
Dividend Restrictions [Table]
Dividend Restrictions [Table]
Subsegments [Axis]
Subsegments [Axis]
Subsegments [Domain]
Subsegments [Domain]
Wright Flood
Wright National Flood Insurance Company [Member]
Wright National Flood Insurance Company [Member]
Range [Axis]
Range [Axis]
Range [Domain]
Range [Domain]
Maximum
Maximum [Member]
Scenario [Axis]
Scenario [Axis]
Scenario, Unspecified [Domain]
Scenario, Unspecified [Domain]
Dividend Restrictions [Line Items]
Dividend Restrictions [Line Items]
[Line Items] for Dividend Restrictions [Table]
Dividend rate as a percentage of net income
Fair Value Assumptions, Expected Dividend Rate
Ordinary dividends payment description
Statutory Dividend Payment Restrictions Disclosure
Maximum dividend payout that may be made without prior approval
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments without Regulatory Approval
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reportable segments
Number of Reportable Segments
Document And Entity Information [Abstract]
Document and Entity Information [Abstract]
Document Type
Document Type
Amendment Flag
Amendment Flag
Document Period End Date
Document Period End Date
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus
Document Fiscal Period Focus
Trading Symbol
Trading Symbol
Entity Registrant Name
Entity Registrant Name
Entity Central Index Key
Entity Central Index Key
Current Fiscal Year End Date
Current Fiscal Year End Date
Entity Filer Category
Entity Filer Category
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Entity Public Float
Entity Public Float
Statutory Accounting Practices [Abstract]
Statutory Accounting Practices [Abstract]
Statutory Accounting Practices [Table]
Statutory Accounting Practices [Table]
Statutory Accounting Practices [Line Items]
Statutory Accounting Practices [Line Items]
Statutory capital and surplus required
Statutory Accounting Practices, Statutory Capital and Surplus Required
Statutory capital and surplus
Statutory Accounting Practices, Statutory Capital and Surplus, Balance
Statutory net Income
Statutory Accounting Practices, Statutory Net Income Amount
Schedule of Goodwill [Table]
Schedule of Goodwill [Table]
Segments [Axis]
Segments [Axis]
Segments [Domain]
Segments [Domain]
Services
Retail [Member]
Retail [Member]
National Programs
National Programs [Member]
National Programs [Member]
Wholesale Brokerage
Wholesale Brokerage [Member]
Wholesale Brokerage [Member]
Services
Services [Member]
Services [Member]
Goodwill [Line Items]
Goodwill [Line Items]
Goodwill [Roll Forward]
Goodwill [Roll Forward]
Beginning balance
Goodwill
Goodwill of acquired businesses
Goodwill, Acquired During Period
Goodwill, Transfers
Goodwill, Transfers
Goodwill disposed of relating to sales of businesses
Goodwill, Written off Related to Sale of Business Unit
Ending balance
Business Combinations [Abstract]
Schedule of Business Acquisitions, by Acquisition [Table]
Schedule of Business Acquisitions, by Acquisition [Table]
Business Acquisition [Axis]
Business Acquisition [Axis]
Business Acquisition, Acquiree [Domain]
Business Acquisition, Acquiree [Domain]
Business Combinations - Asset Deals [Member]
Business Combinations - Asset Deals [Member]
Business Combinations - Asset Deals [Member]
Business Combinations - Stock Deals [Member]
Business Combinations - Stock Deals [Member]
Business Combinations - Stock Deals [Member]
Balance Sheet Location [Axis]
Balance Sheet Location [Axis]
Balance Sheet Location [Domain]
Balance Sheet Location [Domain]
Other non-current liability
Other Noncurrent Liabilities [Member]
Services [Member]
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets by Major Class [Axis]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Finite-Lived Intangible Assets, Major Class Name [Domain]
Purchased customer accounts
Customer Relationships [Member]
Non-compete agreements
Noncompete Agreements [Member]
Extinguishment of Debt [Axis]
Extinguishment of Debt [Axis]
Extinguishment of Debt, Type [Domain]
Extinguishment of Debt, Type [Domain]
Accounts payable
Accounts Payable [Member]
Business Acquisition [Line Items]
Business Acquisition [Line Items]
Number of acquisitions
Number of Businesses Acquired
Aggregate purchase price of acquisitions
Business Acquisitions Purchase Price Allocation Adjustment Purchase Price
Business acquisitions purchase price allocation adjustment purchase price.
Payments to Acquire Businesses, Gross
Payments to Acquire Businesses, Gross
Weighted average life (years)
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life
Goodwill assigned
Goodwill, Fair Value Disclosure
Goodwill currently deductible for income tax purposes
Business Acquisition, Goodwill, Expected Tax Deductible Amount
Goodwill currently non-deductible for income tax purposes
Business Acquisition Purchase Price Allocation Goodwill Non Deductible Amount
The amount of goodwill not deductible for tax purposes.
Goodwill related to the recorded earn-out payables
Earn Out Payable Not Deductible Until Earned Paid
Earn out payable not deductible until earned paid
Total revenues related to acquisitions
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual
Income before income taxes related to acquisitions
Business Combination Pro Forma Information Income Loss Before Income Taxes Of Acquiree Since Acquisition Date Actual
Business Combination Pro Forma Information Income Loss Before Income Taxes Of Acquiree Since Acquisition Date Actual
Estimated acquisition earn-out payables
Business Acquisition Earn Out Payables
Business acquisition earn out payables.
Investments, Debt and Equity Securities [Abstract]
Number of securities in unrealized loss position
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions
Proceeds from sale of investment in fixed maturity securities
Proceeds from Sale and Maturity of Available-for-sale Securities
Investment security maturity date, start
Investment Maturity Date Range Start
Investment security maturity date, End
Investment Maturity Date Range End
Gross realized gains and losses of securities
Available-for-sale Securities, Restrictions, Additional Information
Investments on deposit with the state insurance department
Assets Held by Insurance Regulators
Equity [Abstract]
Shareholders' Equity
Stockholders' Equity Note Disclosure [Text Block]
Statement of Cash Flows [Abstract]
Cash flows from operating activities:
Net Cash Provided by (Used in) Operating Activities [Abstract]
Net income
Net Income (Loss) Attributable to Parent
Adjustments to reconcile net income to net cash provided by operating activities:
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Amortization
Amortization
Depreciation
Depreciation
Non-cash stock-based compensation
Share-based Compensation
Change in estimated acquisition earn-out payables
Change In Estimated Acquisition Earn Out Payable
Change In Estimated Acquisition Earn Out Payable
Deferred income taxes
Deferred Income Tax Expense (Benefit)
Amortization of debt discount
Amortization of Debt Discount (Premium)
Deferred Finance Costs, Own-share Lending Arrangement, Issuance Costs, Amortization Expense
Deferred Finance Costs, Own-share Lending Arrangement, Issuance Costs, Amortization Expense
Accretion (Amortization) of Discounts and Premiums, Investments
Accretion (Amortization) of Discounts and Premiums, Investments
Income tax benefit from exercise of shares from the stock benefit plans
Excess Tax Benefit from Share-based Compensation, Operating Activities
Payments On Acquisition Earn Outs In Excess Of Original Estimated Payables
Payments On Acquisition Earn Outs In Excess Of Original Estimated Payables
Payments on acquisition earn-outs in excess of original estimated payables.
Net gain on sales of investments, fixed assets and customer accounts
Net Loss Gain On Sales Of Investments Fixed Assets And Customer Accounts
Net loss (gain) on sales of investments, fixed assets and customer accounts
Changes in operating assets and liabilities, net of effect from acquisitions and divestitures:
Increase (Decrease) in Operating Capital [Abstract]
Restricted cash and investments (increase)
Increase (Decrease) in Restricted Cash
Premiums, commissions and fees receivable decrease (increase)
Increase Decrease In Premiums Commission And Fees Receivable
The net change during the reporting period in other amounts due to the reporting entity, which are not otherwise defined in the taxonomy.
Reinsurance recoverables (increase)
Increase (Decrease) in Reinsurance Recoverable
Prepaid reinsurance premiums decrease
Increase (Decrease) in Prepaid Reinsurance Premiums
Other assets (increase)
Increase (Decrease) in Other Operating Assets
Premiums payable to insurance companies (decrease) increase
Increase Decrease In Premiums Payable To Insurance Companies
The net change during the reporting period in the premiums payable to insurance companies.
Premium deposits and credits due customers increase (decrease)
Increase Decrease In Premium Deposits And Credits Due Customers Decrease Increase
The net change during the reporting period in the premiums deposits and credits due customers.
Losses and loss adjustment reserve increase
Increase Decrease For Loss And Loss Adjustment Expense
Increase decrease for loss and loss adjustment expense.
Unearned premiums (decrease)
Increase (Decrease) in Unearned Premiums
Accounts payable increase
Increase (Decrease) in Accounts Payable
Accrued expenses and other liabilities (decrease)
Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities
Other liabilities (decrease)
Increase (Decrease) in Other Operating Liabilities
Net cash provided by operating activities
Net Cash Provided by (Used in) Operating Activities, Continuing Operations
Cash flows from investing activities:
Net Cash Provided by (Used in) Investing Activities [Abstract]
Additions to fixed assets
Payments to Acquire Property, Plant, and Equipment
Payments for businesses acquired, net of cash acquired
Payments to Acquire Businesses, Net of Cash Acquired
Proceeds from sales of fixed assets and customer accounts
Proceeds from Sale of Productive Assets
Purchases of investments
Payments to Acquire Investments
Proceeds from Sale, Maturity and Collection of Investments
Proceeds from Sale, Maturity and Collection of Investments
Net cash used in investing activities
Net Cash Provided by (Used in) Investing Activities, Continuing Operations
Cash flows from financing activities:
Net Cash Provided by (Used in) Financing Activities [Abstract]
Payments on acquisition earn-outs
Payments On Acquisition Earn Outs
Payments on acquisition earn-outs
Payments on long-term debt
Repayments of Long-term Debt
Income tax benefit from exercise of shares from the stock benefit plans
Excess Tax Benefit from Share-based Compensation, Financing Activities
Issuances of common stock for employee stock benefit plans
Proceeds from Stock Options Exercised
Repurchase Of Stock Benefit Plan Shares For Employees To Fund Tax Withholdings
Repurchase Of Stock Benefit Plan Shares For Employees To Fund Tax Withholdings
Repurchase of stock benefit plan shares for employees to fund tax withholdings
Purchase of treasury stock
Payments for Repurchase of Common Stock
Prepayment of accelerated share repurchase program
Payments for Repurchase of Other Equity
Cash dividends paid
Payments of Dividends
Net cash (used in) financing activities
Net Cash Provided by (Used in) Financing Activities, Continuing Operations
Net (decrease) in cash and cash equivalents
Cash and Cash Equivalents, Period Increase (Decrease)
Cash and cash equivalents at beginning of period
Cash and Cash Equivalents, at Carrying Value
Cash and cash equivalents at end of period
Proceeds from Lines of Credit
Proceeds from Lines of Credit
Accelerated Share Repurchases [Table]
Accelerated Share Repurchases [Table]
Share Repurchase Program [Axis]
Share Repurchase Program [Axis]
Share Repurchase Program [Domain]
Share Repurchase Program [Domain]
Third Accelerated Share Repurchase Program [Member]
Third Accelerated Share Repurchase Program [Member]
Third Accelerated Share Repurchase Program [Member]
Accelerated Share Repurchase Agreement [Member]
Accelerated Share Repurchase Agreement [Member]
Accelerated Share Repurchase Agreement [Member]
Second Accelerated Share Repurchase Agreement
Second Accelerated Share Repurchase Agreement [Member]
Second Accelerated Share Repurchase Agreement [Member]
Repurchase Agreements [Member]
Repurchase Agreements [Member]
Accelerated Share Repurchases [Line Items]
Accelerated Share Repurchases [Line Items]
Shares repurchased, authorized amount
Stock Repurchase Program, Authorized Amount
Shares repurchased, aggregate repurchase amount
Accelerated Share Repurchases, Settlement (Payment) or Receipt
Shares repurchased, number of shares received initially (in shares)
Treasury Stock, Shares
Fair value of common stock repurchased
Treasury Stock, Value
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment [Table]
Schedule of Segment Reporting Information, by Segment [Table]
Entity by Location [Axis]
Entity by Location [Axis]
Location [Domain]
Location [Domain]
London, Bermuda and Cayman Islands
London Bermuda And Cayman Islands Operations [Member]
London Bermuda and Cayman Islands operations.
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Total revenues
Revenues
Earnings Per Share [Abstract]
Net Income Per Share
Earnings Per Share [Text Block]
Schedule of Available-for-sale Securities [Table]
Schedule of Available-for-sale Securities [Table]
Major Types of Debt and Equity Securities [Axis]
Major Types of Debt and Equity Securities [Axis]
Major Types of Debt and Equity Securities [Domain]
Major Types of Debt and Equity Securities [Domain]
U.S. Treasury securities, obligations of U.S. Government agencies and Municipals
US Treasury Securities [Member]
Foreign government
Foreign Government Debt Securities [Member]
Corporate debt
Corporate Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Schedule of Available-for-sale Securities [Line Items]
Fair Value, Less than 12 Months
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value
Unrealized Losses, Less than 12 Months
Available For Sale Securities Continuous Unrealized Loss Position Less Than 12 Months Aggregate Losses Accumulated In AOCI
Amount of accumulated pre-tax unrealized loss on investments in available-for-sale securities that have been in a loss position for less than twelve months recognized in Accumulated Other Comprehensive Income (AOCI).
Fair Value, 12 Months or More
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value
Unrealized Losses, 12 Months or More
Available For Sale Securities Continuous Unrealized Loss Position 12 Months Or Longer Aggregate Losses Accumulated In AOCI
Amount of accumulated pre-tax unrealized loss on securities classified as available-for-sale that have been in a loss position for twelve months or longer recognized in Accumulated Other Comprehensive Income (AOCI).
Fair Value
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value
Unrealized Losses
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses Accumulated In AOCI
Amount of accumulated pre-tax unrealized loss on securities classified as available-for-sale recognized in Accumulated Other Comprehensive Income (AOCI).
Text Block [Abstract]
Share-based Compensation
Debt Disclosure [Abstract]
Long-Term Debt
Debt Disclosure [Text Block]
Reinsurance Disclosures [Abstract]
Effects of Reinsurance on Premiums Written and Earned
Effects of Reinsurance [Table Text Block]
Reconciliation between Basic and Diluted Weighted Average Shares Outstanding
Schedule of Weighted Average Number of Shares [Table Text Block]
Investments
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]
Changes in Carrying Value of Goodwill by Operating Segment
Schedule of Goodwill [Table Text Block]
Schedule of Investments in Fixed Maturity Securities
Available For Sale Securities Debt Maturities Table [Table Text Block]
Available For Sale Securities Debt Maturities Table [Text Block]
Summary of Unrealized Loss Position
Unrealized Loss Position Investments Table [Table Text Block]
Unrealized Loss Position Investments Table [Text Block]
Amortized Cost and Fair Value of Fixed Maturity Securities by Contractual Maturity
Investments Classified by Contractual Maturity Date [Table Text Block]
Amortized Cost
Available-for-sale Securities, Amortized Cost Basis [Abstract]
Due in one year or less
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis
Due after one year through five years
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Amortized Cost Basis
Due after five years through ten years
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Amortized Cost Basis
Amortized Cost, Total
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost Basis
Fair Value
Available-for-sale Securities, Fair Value to Amortized Cost Basis [Abstract]
Due in one year or less
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Fair Value
Due after one year through five years
Available-for-sale Securities, Debt Maturities, Year Two Through Five, Fair Value
Due after five years through ten years
Available-for-sale Securities, Debt Maturities, Year Six Through Ten, Fair Value
Fair Value, Total
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-term Debt Instruments [Table]
Debt Instrument [Axis]
Debt Instrument [Axis]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
5.660% senior notes, Series C, semi-annual interest payments, balloon due 2016
Five Point Three Seven Zero Percent Senior Notes Due Two Thousand Fifteen [Member]
Five Point Three Seven Zero Percent Senior Notes Due Two Thousand Fifteen [Member]
4.500% senior notes, Series E, quarterly interest payments, balloon due 2018
Four Point Five Zero Zero Percent Senior Notes Due Two Thousand Eighteen [Member]
Four Point Five Zero Zero Percent Senior Notes Due Two Thousand Eighteen [Member]
4.200% senior notes, semi-annual interest payments, balloon due 2024
Four Point Two Zero Zero Percent Senior Notes Due Two Thousand Twenty Four [Member]
Four Point Two Zero Zero Percent Senior Notes Due Two Thousand Twenty Four [Member]
5-year term-loan facility, periodic interest and principal payments, LIBOR plus up to 1.75%, expires May 20, 2019
Five Year Term Loan Facility Expires In Two Thousand Ninteen [Member]
Five Year Term Loan Facility Expires In Two Thousand Ninteen [Member]
5-year revolving-loan facility, periodic interest payments, currently LIBOR plus 1.50%, plus commitment fees up to 0.25%, expires May 20, 2019
Five Year Revolving Loan Facility Expires In Two Thousand Ninteen [Member]
Five Year Revolving Loan Facility Expires In Two Thousand Ninteen [Member]
Revolving Credit Loan Expires In Two Thousand Sixteen [Member]
Revolving Credit Loan Expires In Two Thousand Sixteen [Member]
Revolving Credit Loan Expires In Two Thousand Sixteen [Member]
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Current portion of loan facility
Line of Credit, Current
Current portion of senior notes
Senior Notes, Current
Total current portion of long-term debt
Long-term Debt, Current Maturities
Total notes
Senior Notes
Long-term credit agreements
Long-term Line of Credit
Debt Issuance Costs, Gross
Debt Issuance Costs, Gross
Total long-term debt
Long-term Debt, Excluding Current Maturities
Current portion of long-term debt
Total debt
Long-term Debt
Notes Payable, Current
Notes Payable, Current
Subsidiary Dividend Restrictions
Dividend Payment Restrictions [Text Block]
Purchase price allocation for current year acquisitions and adjustments made for prior year acquisitions
Schedule of Business Acquisitions, by Acquisition [Table Text Block]
Estimated fair values of aggregate assets and liabilities acquired
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]
Unaudited pro forma results
Business Acquisition, Pro Forma Information [Table Text Block]
Additions, payments, and net changes, as well as interest expense accretion on estimated acquisition earn-out payables
Schedule of Business Acquisitions by Acquisition, Contingent Consideration [Table Text Block]
Business Combination, Separately Recognized Transactions [Table]
Business Combination, Separately Recognized Transactions [Table]
Business Combination, Separately Recognized Transactions [Axis]
Business Combination, Separately Recognized Transactions [Axis]
Business Combination, Separately Recognized Transactions [Domain]
Business Combination, Separately Recognized Transactions [Domain]
SSAD [Member]
SSAD [Member]
SSAD [Member]
Other Acquisitions [Member]
Other Acquisitions [Member]
Other Acquisitions [Member]
Various
Various [Member]
Various [member]
Business Combination, Separately Recognized Transactions [Line Items]
Business Combination, Separately Recognized Transactions [Line Items]
Business Acquisitions Purchase Price Allocation Current Assets Cash And Cash Equivalents
Business Acquisitions Purchase Price Allocation Current Assets Cash And Cash Equivalents
Business Acquisitions Purchase Price Allocation Current Assets Cash And Cash Equivalents
Effective Date of Acquisition
Business Acquisition, Effective Date of Acquisition
Cash Paid
Business Acquisition Cost of Entity Note Payable
Business Acquisition Cost of Entity Note Payable
Business Acquisition Cost of Entity Note Payable
Other Payable
Business Acquisition Cost Of Acquired Entity Other Payable
Business Acquisition Cost Of Acquired Entity Other Payable
Recorded Earn-Out Payable
Business Acquisitions Contingent Consideration At Fair Value
Business Acquisitions Contingent Consideration At Fair Value
Net Assets Acquired
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net
Maximum Potential Earn- Out Payable
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High
Beginning balance
Additions to estimated acquisition earn-out payables
Additions To Estimated Acquisition Earn Out Payables
Additions to estimated acquisition earn out payables.
Payments for estimated acquisition earn-out payables
Payments For Estimated Acquisition Earn Out Payables
Payments for estimated acquisition earn out payables.
Subtotal
Business Acquisition Earn Out Payable After Change In Additions And Payments
Business Acquisition Earn Out Payable After Change In Additions And Payments
Net change in earnings from estimated acquisition earn-out payables:
Net Change in Earnings from Estimated Acquisition Earn-out Payables [Abstract]
Net Change in Earnings from Estimated Acquisition Earn-out Payables [Abstract]
Change in fair value on estimated acquisition earn-out payables
Change In Fair Value Estimated Acquisition Earn Out Payables
Change In Fair Value Estimated Acquisition Earn Out Payables.
Interest expense accretion
Asset Retirement Obligation, Accretion Expense
Net change in earnings from estimated acquisition earn-out payables
Ending balance
Supplemental Cash Flow Elements [Abstract]
Cash paid during the period for:
Interest Paid [Abstract]
Interest
Interest Paid
Income taxes
Income Taxes Paid
Significant non-cash investing and financing activities
Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract]
Other payable issued for purchased customer accounts
Other Payables
Obligations of a business that arise from the acquisition of merchandise, materials, supplies and services used in the production and/or sale of goods and services not classified as Trade Payables.
Estimated acquisition earn-out payables and related charges
Recorded Earn Out Payable
Recorded Earn-out Payable
Business Acquisition Cost of Entity Note Payable
Notes Issued
Notes received on the sale of fixed assets and customer accounts
Notes Receivable On Sale Of Fixed Assets And Customer Accounts
Notes Receivable on the Sale of Fixed Assets and Customer Accounts
Nature of Operations
Nature Of Operation Policy [Text Block]
Nature Of Operation Policy.
Basis of Accounting
Basis of Accounting, Policy [Policy Text Block]
Recently Issued Accounting Pronouncements
New Accounting Pronouncements, Policy [Policy Text Block]
Amortizable Intangible Assets
Schedule of Finite-Lived Intangible Assets [Table Text Block]
Goodwill
Goodwill and Intangible Assets Disclosure [Text Block]
Income Statement [Abstract]
REVENUES
Revenues [Abstract]
Commissions and fees
Insurance Commissions and Fees
Investment income
Investment Income, Nonoperating
Other income, net
Other Income
Total revenues
EXPENSES
Costs and Expenses [Abstract]
Employee compensation and benefits
Employee Compensation And Benefits
The aggregate amount of expenditures for salaries, wages, profit sharing and incentive compensation, and other employee benefits, including pension and other postretirement benefit expense, but excluding share-based compensation.)
Other operating expenses
Other Cost and Expense, Operating
Gain on disposal
Gain (Loss) on Disposition of Assets
Interest
Interest Expense
Total expenses
Operating Expenses
Income before income taxes
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest
Income taxes
Income Tax Expense (Benefit)
Net income
Net income per share:
Basic (in dollars per share)
Earnings Per Share, Basic
Diluted (in dollars per share)
Earnings Per Share, Diluted
Dividends declared per share (in dollars per share)
Common Stock, Dividends, Per Share, Declared
Statement of Financial Position [Abstract]
Statement [Table]
Statement [Table]
Class of Stock [Axis]
Class of Stock [Axis]
Class of Stock [Domain]
Class of Stock [Domain]
Statement [Line Items]
Statement [Line Items]
Common stock, par value (in dollars per share)
Common Stock, Par or Stated Value Per Share
Common stock, shares authorized (in shares)
Common Stock, Shares Authorized
Common stock, shares issued (in shares)
Common Stock, Shares, Issued
Common stock, shares outstanding (in shares)
Common Stock, Shares, Outstanding
Treasury stock shares (in shares)
Tax effect of accumulated other comprehensive income
Other Comprehensive Income (Loss), Tax
Nature of Operations
Nature of Operations [Text Block]
Consolidation Items [Axis]
Consolidation Items [Axis]
Consolidation Items [Domain]
Consolidation Items [Domain]
Subsegments Consolidation Items [Axis]
Subsegments Consolidation Items [Axis]
Subsegments Consolidation Items [Domain]
Subsegments Consolidation Items [Domain]
Segment Information
Schedule of Segment Reporting Information, by Segment [Table Text Block]
Short duration fixed income fund
Short Duration Fixed Income Fund [Member]
Short Duration Fixed Income Fund [Member]
Cost
Available-for-sale Debt Securities, Amortized Cost Basis
Gross Unrealized Gains
Available-for-sale Debt Securities, Accumulated Gross Unrealized Gain, before Tax
Gross Unrealized Losses
Available-for-sale Securities, Accumulated Gross Unrealized Loss, before Tax
Fair Value
Available-for-sale Securities
Fair Value Of Assets And Liabilities Statement [Table]
Fair Value Of Assets And Liabilities Statement [Table]
Fair Value Of Assets And Liabilities Statement [Table]
Fair Value Of Assets And Liabilities Statement [Line Items]
Fair Value Of Assets And Liabilities Statement [Line Items]
Fair Value Of Assets And Liabilities Statement [Line Items]
Other current assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets
Fixed assets
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Property, Plant, and Equipment
Goodwill
Purchased customer accounts
Business Acquisitions Purchase Price Allocation Amortizable Intangible Assets
Business Acquisitions Purchase Price Allocation Amortizable Intangible Assets
Non-compete agreements
Business Acquisitions Purchase Price Allocation Noncompete Agreements Gross
Business acquisitions purchase price allocation non-compete agreements gross.
Total assets acquired
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets
Other current liabilities
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other
Deferred Tax Liabilities, Net
Deferred Tax Liabilities, Net
Total liabilities assumed
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities
Net assets acquired
Commitments and Contingencies Disclosure [Abstract]
Legal and Regulatory Proceedings
Commitments and Contingencies Disclosure [Text Block]
Summary of Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
Losses and Loss Adjustment Reserve
Reinsurance Loss, Loss Adjustment Expenses [Text Block]
Reinsurance Loss, Loss Adjustment Expenses [Text Block]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustments [Table]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustments [Table]
Nonrecurring Adjustment [Axis]
Nonrecurring Adjustment [Axis]
Nonrecurring Adjustment [Domain]
Nonrecurring Adjustment [Domain]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual
Business Combination Pro Forma Information Income Loss Before Income Taxes Of Acquiree Since Acquisition Date Actual
Total revenues
Business Acquisition, Pro Forma Revenue
Income before income taxes
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax
Net income
Business Acquisition, Pro Forma Net Income (Loss)
Basic (in dollars per share)
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax, Per Share, Basic
Diluted (in dollars per share)
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations, Net of Tax, Per Share, Diluted
Weighted Average Basic Shares Outstanding, Pro Forma
Weighted Average Basic Shares Outstanding, Pro Forma
Weighted average number of shares outstanding:
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Pro Forma Weighted Average Shares Outstanding, Diluted
Pro Forma Weighted Average Shares Outstanding, Diluted
Net income attributable to unvested awarded performance stock
Net Income Attributable To Unvested Awarded Performance Stock
Net income attributable to unvested awarded performance stock
Net income attributable to common shares
Net Income (Loss) Available to Common Stockholders, Basic
Weighted average number of common shares outstanding - basic (in shares)
Weighted Average Number of Shares Issued, Basic
Less unvested awarded performance stock included in weighted average number of common shares outstanding - basic (in shares)
Incremental Common Shares Attributable to Participating Nonvested Shares with Non-forfeitable Dividend Rights
Weighted average number of common shares outstanding for basic earnings per common share (in shares)
Weighted Average Number of Shares Outstanding, Basic
Dilutive effect of stock options (in shares)
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements
Weighted average number of shares outstanding - diluted (in shares)
Weighted Average Number of Shares Outstanding, Diluted
Schedule of Finite-Lived Intangible Assets [Table]
Schedule of Finite-Lived Intangible Assets [Table]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value
Finite-Lived Intangible Assets, Gross
Accumulated Amortization
Finite-Lived Intangible Assets, Accumulated Amortization
Net Carrying Value
Intangible Assets, Net (Excluding Goodwill)
Weighted Average Life (Years)
Finite-Lived Intangible Asset, Useful Life
Minimum
Minimum [Member]
Variable Rate [Axis]
Variable Rate [Axis]
Variable Rate [Domain]
Variable Rate [Domain]
LIBOR
London Interbank Offered Rate (LIBOR) [Member]
Trading Activity [Axis]
Trading Activity [Axis]
Trading Activity, by Type [Domain]
Trading Activity, by Type [Domain]
Master Agreement
Master Agreement [Member]
Master Agreement [Member]
New Master Agreement
New Master Agreement [Member]
New Master Agreement [Member]
Credit Facility [Axis]
Credit Facility [Axis]
Credit Facility [Domain]
Credit Facility [Domain]
Line of Credit
Line of Credit [Member]
Term Loan
Term Loan [Member]
Term Loan [Member]
Revolving Credit Facility
Revolving Credit Facility [Member]
Uncommitted Facility
Uncommitted Facility [Member]
Uncommitted Facility [Member]
Lender Name [Axis]
Lender Name [Axis]
Line of Credit Facility, Lender [Domain]
Line of Credit Facility, Lender [Domain]
Wells Fargo Revolver
Wells Fargo [Member]
Wells Fargo [Member]
Auction Market Preferred Securities, Stock Series [Axis]
Auction Market Preferred Securities, Stock Series [Axis]
Auction Market Preferred Securities, Stock Series, Title [Domain]
Auction Market Preferred Securities, Stock Series, Title [Domain]
Series C
Series C [Member]
Series C [Member]
Series D
Series D [Member]
Series D [Member]
Series E
Series E [Member]
Series E [Member]
Legal Entity [Axis]
Legal Entity [Axis]
Entity [Domain]
Entity [Domain]
Beecher Acquisition
Beecher [Member]
Beecher [Member]
Credit Agreement
Credit Agreement [Member]
Credit Agreement [Member]
Unsecured Senior Notes
Unsecured Senior Notes [Member]
Unsecured Senior Notes [Member]
Unsecured senior notes outstanding
Unsecured Debt
Debt instrument interest rate stated percentage
Debt Instrument, Interest Rate, Stated Percentage
Credit facility, outstanding amount
Number of extension periods
Debt Instrument, Number of Extension Periods
Debt Instrument, Number of Extension Periods
Extension period
Debt Instrument, Extension Period
Debt Instrument, Extension Period
Debt instrument, maturity date
Debt Instrument, Maturity Date
Revolving and term loan
Debt Instrument Revolving And Term Loan
Debt instrument, revolving and term loan
Debt instrument, variable interest rate
Debt Instrument, Basis Spread on Variable Rate
Potential increased in line of credit facility
Line of Credit Facility, Maximum Borrowing Capacity
Letter of credit usage fee, minimum
Letter Of Credit Usage Fee Minimum
Letter Of Credit Usage Fee Minimum
Letter of credit usage fee, maximum
Letter Of Credit Usage Fee Maximum
Letter Of Credit Usage Fee Maximum
LIBOR below base rate
Libor Rate Below Base Rate
LIBOR Rate Below Base Rate
Availability fees, minimum
Fees On Loans Minimum
Fees On Loans Minimum
Availability fees, maximum
Fees On Loans Maximum
Fees On Loans Maximum
Borrowings outstanding
Line of Credit Facility, Borrowings in the Period
Line of Credit Facility, Borrowings in the Period
Letter of credit fees
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage
Unsecured revolving credit facility
Unsecured Revolving Credit Facility
Unsecured Revolving Credit Facility
Unsecured term loans
Unsecured Long-term Debt, Noncurrent
Facility fee
Line of Credit Facility, Commitment Fee Percentage
Proceeds from lines of credit
First principal payment
Debt Instrument, Periodic Payment, Principal
Debt instrument, face amount
Debt Instrument, Face Amount
Debt instrument maturity year
Debt Instruments Maturity Year
Debt Instruments Maturity Year
Outstanding debt balance
30-day Adjusted LIBOR Rate
Adjusted Libor Rate
Adjusted LIBOR rate
Operating Segments
Operating Segments [Member]
Other
Segment Reconciling Items [Member]
Interest expense
Income before income taxes
Total assets
Assets
Capital expenditures
Reinsurance Premiums for Insurance Companies, by Product Segment [Table]
Reinsurance Premiums for Insurance Companies, by Product Segment [Table]
Plan Name [Axis]
Plan Name [Axis]
Plan Name [Domain]
Plan Name [Domain]
Quota Share Agreement
Quota Share Agreement Member [Member]
Quota Share Agreement Member [Member]
Reinsurance Policy, Type [Axis]
Reinsurance Policy, Type [Axis]
Reinsurance Policy [Domain]
Reinsurance Policy [Domain]
Homeowners
Homeowners [Member]
Homeowners [Member]
Private Passenger Auto Liability
Private Passenger Auto Liability [Member]
Private Passenger Auto Liability [Member]
Other Liability
Other Liability [Member]
Other Liability [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Ceded rate of premiums under insurance program
Percentage of Ceded Premiums
Percentage of ceded premiums.
Expenses and allowance rate received in premiums
Percentage of reinsurance recoverables allowance
Percentage of reinsurance recoverables allowance.
Premiums written net
Ceded Premiums Written
Effective cedes rate under quota share agreement
Percentage of flood premiums ceded
Percentage of flood premiums ceded.
Commission rate, percent of ceded written premiums
Reinsurance percentage of ceding commission
Reinsurance percentage of ceding commission.
Ceded amount
Reinsurance Recoverables, Including Reinsurance Premium Paid
Ceded unpaid loss
Reinsurance Recoverable for Unpaid Claims and Claims Adjustments
Reinsurance recoverable, incurred but not reported claims
Reinsurance Recoverables, Incurred but Not Reported Claims
The reinsurance recoverable
Reinsurance Recoverables on Unpaid Losses, Gross
Prepaid reinsurance premiums
Prepaid Reinsurance Premiums
Increase (Decrease) in Loss and Loss Adjustment Expense Reserve
Increase (Decrease) in Liability for Claims and Claims Adjustment Expense Reserve
Reserve for losses and loss adjustment expense
Reserve For Losses And Loss Adjustment Expenses For Reinsurance Liability
Reserve For Losses And Loss Adjustment Expenses For Reinsurance Liability
Number of reinsurers
Number of reinsurers
Number of reinsurers.
Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities
Cash Flow, Supplemental Disclosures [Text Block]
Long-Term Debt Instrument
Schedule of Long-term Debt Instruments [Table Text Block]
Debt Issuance Costs, Line of Credit Arrangements, Gross
Debt Issuance Costs, Line of Credit Arrangements, Gross
Wells Fargo [Member]
5.660% senior notes, Series C, semi-annual interest payments, balloon due 2016
Five Point Six Six Zero Percent Senior Notes Due Two Thousand Sixteen [Member]
Five Point Six Six Zero Percent Senior Notes Due Two Thousand Sixteen [Member]
Five Year Term Loan Facility Expires In Two Thousand Ninteen Current [Member]
Five Year Term Loan Facility Expires In Two Thousand Ninteen Current [Member]
Five Year Term Loan Facility Expires In Two Thousand Ninteen Current [Member]
Revolving credit loan, quarterly interest payments, LIBOR plus up to 1.40% and availability fee up to 0.25%, expires December 31, 2016
Line of Credit Facility, Remaining Borrowing Capacity
Line of Credit Facility, Remaining Borrowing Capacity
Line of credit facility, expiration period
Line of Credit Facility, Expiration Period
Debt instrument, interest rate, stated percentage
Line of credit facility, commitment fee percentage
Line of credit facility, expiration date
Line of Credit Facility, Expiration Date
Business Combinations
Business Combination Disclosure [Text Block]
Written
Premiums Written, Net [Abstract]
Direct premiums
Direct Premiums Written
Ceded premiums
Net premiums
Premiums Written, Net
Earned
Premiums Earned, Net [Abstract]
Direct premiums
Direct Premiums Earned
Ceded premiums
Ceded Premiums Earned
Net premiums
Premiums Earned, Net
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Basis of Financial Reporting
Condensed Financial Information of Parent Company Only Disclosure [Text Block]
Statutory Financial Information
Statutory Financial Information [Text Block]
The entire disclosure for statutory financial information.
ASSETS
Assets [Abstract]
Current Assets:
Assets, Current [Abstract]
Cash and cash equivalents
Restricted cash and investments
Restricted Cash and Investments, Current
Short-term investments
Short-term Investments
Premiums, commissions and fees receivable
Premiums Commissions And Fees Receivable
Insurance premiums, commissions and fees due from insured or insurance companies that are currently due, including notes receivables, accrued direct bill commissions due from carriers, guaranteed supplemental commissions and profit-sharing contingent commissions, and fees in lieu of commissions earned)
Reinsurance recoverable
Reinsurance Recoverables, Gross
Deferred income taxes
Deferred Tax Assets, Net of Valuation Allowance, Current
Other current assets
Other Assets, Current
Total current assets
Assets, Current
Fixed assets, net
Property, Plant and Equipment, Net
Goodwill
Amortizable intangible assets, net
Investments
Investments
Other assets
Other Assets, Noncurrent
Total assets
LIABILITIES AND SHAREHOLDERS’ EQUITY
Liabilities and Equity [Abstract]
Current Liabilities:
Liabilities, Current [Abstract]
Premiums payable to insurance companies
Premiums Payable To Insurance Companies
Insurance premiums payable (net of commissions) to insurance carriers, commissions payable to agents, brokers, third parties, etc that are currently due; also includes other insurance-related liabilities such as surplus lines and other premium related taxes and fees.
Losses and loss adjustment reserve
Liability for Claims and Claims Adjustment Expense
Unearned premiums
Unearned Premiums
Premium deposits and credits due customers
Premium Deposits And Credits Due Customers
Liability for net credit balance due customers resulting from changes, cancellation of coverage or payments collected for premiums not yet effective.
Accounts payable
Accounts Payable, Current
Accrued expenses and other liabilities
Accrued Liabilities, Current
Current portion of long-term debt
Total current liabilities
Liabilities, Current
Long-term debt less unamortized discount and debt issuance costs
Deferred income taxes, net
Deferred Tax Liabilities, Net, Noncurrent
Other liabilities
Other Liabilities, Noncurrent
Shareholders’ Equity:
Stockholders' Equity Attributable to Parent [Abstract]
Common stock, par value $0.10 per share; authorized 280,000 shares; issued 147,967 shares and outstanding 140,173 shares at 2016, issued 146,415 shares and outstanding 138,985 shares at 2015
Common Stock, Value, Issued
Additional paid-in capital
Additional Paid in Capital, Common Stock
Treasury stock, at cost 7,794 and 7,430 shares at 2016 and 2015, respectively
Retained earnings
Retained Earnings (Accumulated Deficit)
Total shareholders’ equity
Stockholders' Equity Attributable to Parent
Total liabilities and shareholders’ equity
Liabilities and Equity
Amortization expense estimated, year one (2015)
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months
Amortization expense estimated, year two (2016)
Finite-Lived Intangible Assets, Amortization Expense, Year Two
Amortization expense estimated, year three (2017)
Finite-Lived Intangible Assets, Amortization Expense, Year Three
Amortization expense estimated, year four (2018)
Finite-Lived Intangible Assets, Amortization Expense, Year Four
Amortization expense estimated, year five (2019)
Finite-Lived Intangible Assets, Amortization Expense, Year Five