Document and Entity Information Statement [Table] Statement [Line Items] Statement Entity Registrant Name Entity Central Index Key Document Type Document Period End Date Amendment Flag Current Fiscal Year End Date Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Current Reporting Status Entity Filer Category Entity Public Float Entity Common Stock, Shares Outstanding Document Fiscal Year Focus Document Fiscal Period Focus Consolidated Balance Sheets Assets [Abstract] Assets Available-for-sale Securities [Abstract] Investments available for sale, at fair value Fair Value Available-for-sale Securities Fair Value Total investments Total investments Cash Cash Accrued Investment Income Receivable Accrued investment income Accounts Receivable, Net Accounts receivable Accounts receivable, net Deferred Policy Acquisition Costs Deferred policy acquisition costs Property, Plant and Equipment, Net Property and equipment (at cost, less accumulated depreciation of $ 39,260 in 2014 and 36,796 in 2013) Represents, for a mortgage guaranty insurer, the amount of investment in United States Mortgage Guaranty Tax and Loss Bonds issued by the Treasury Department for eligibility for certain tax deductions under enacted tax laws. Mortgage Guaranty Insurer United States Mortgage Guaranty Tax and Loss Bonds Prepaid federal income tax T&L Bonds held as of end of year Deferred Tax Assets, Net Net deferred tax asset Net deferred tax asset Other Assets Other assets Assets Total assets Liabilities and Equity [Abstract] Liabilities and Stockholders' Equity Liabilities [Abstract] Liabilities Liability for Unpaid Claims and Claims Adjustment Expense, Net Net reserve for losses and LAE at end of year Net reserve for losses and LAE at beginning of year Reserve for losses and LAE Unearned Premiums Unearned premium reserve Business Combination, Contingent Consideration, Liability Amounts due under Asset Purchase Agreement Employee-related Liabilities Accrued payroll and bonuses Deferred Tax Liabilities, Net Net deferred tax (liability) Net deferred tax liability Other Accrued Liabilities Other accrued liabilities Liabilities Total liabilities Commitments and Contingencies. Commitments and contingencies Stockholders' Equity Attributable to Parent [Abstract] Stockholders' Equity Common Stock, Value, Issued Common shares Common Shares, $0.015 par value: Authorized - 233,333 in 2014 and 2013; issued 92,546 shares in 2014 and 86,491 shares in 2013 Additional Paid in Capital, Common Stock Additional paid-in capital Accumulated Other Comprehensive Income (Loss), Net of Tax Balance at end of period Balance at beginning of period Accumulated other comprehensive income (loss) Retained Earnings (Accumulated Deficit) Retained earnings (accumulated deficit) Stockholders' Equity Attributable to Parent Balance Balance Total equity Total stockholders' equity Liabilities and Equity Total liabilities and stockholders' equity Available-for-sale Securities, Amortized Cost Basis [Abstract] Amortized Cost Investments available for sale Available-for-sale Securities, Amortized Cost Basis Amortized Cost Total investments Amortized cost (in dollars) Property, Plant and Equipment, Net [Abstract] Property and equipment Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Accumulated Depreciation/Amortization Accumulated depreciation (in dollars) Common Stock, Par or Stated Value Per Share Common Shares, par value (in dollars per share) Common Stock, Shares Authorized Common Shares, authorized Authorized share capital Common Stock, Shares, Issued Common Shares, issued Consolidated Statements of Comprehensive Income (Loss) Class of Stock [Axis] Class Of Stock [Domain] Class of Stock [Domain] Common Class A [Member] Class A Represents the B-2 classification of common stock that has different rights than provided to Class A or B-1 shares, representing ownership interest in a corporation. Common Class B2 [Member] Class B-2 Revenues [Abstract] Revenues: Premiums Written, Net Net premiums written (Increase) Decrease in Unearned Premiums, Net Increase in unearned premiums Premiums Earned, Net Net premiums earned Net premiums earned Net Investment Income Net investment income Net investment income Investment income Available-for-sale Securities, Gross Realized Gain (Loss), Excluding Other than Temporary Impairments Gain on the sale of investments, net Realized investment gains, net Realized gains, net Other Income Other income Revenues Total revenues Benefits, Losses and Expenses [Abstract] Losses and expenses: Policyholder Benefits and Claims Incurred, Net Provision for losses and LAE Represents the aggregate amount of costs incurred during the period, such as those relating to general administration and policy maintenance that do not vary with, and are not primarily related to the acquisition or renewal of insurance contracts and other operating costs, that are associated with the entity's normal revenue producing operation. Other Underwriting and Operating Expenses Other underwriting and operating expenses Benefits, Losses and Expenses Total losses and expenses Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest Income (loss) before income taxes Income (loss) before income taxes Loss before income taxes and equity in undistributed net income in subsidiaries Income Tax Expense (Benefit) Total income tax expense Net Income (Loss) Available to Common Stockholders, Basic Net income (loss) Net income (loss) Net income Net Income (Loss) Attributable to Parent Net income (loss) Net income (loss) Net income (loss) Earnings Per Share, Basic and Diluted [Abstract] Earnings (loss) per share: Earnings Per Share, Basic Basic (in dollars per share) Basic earnings (loss) per share (in dollars per share) Earnings Per Share, Basic, Undistributed Basic earnings (loss) per share (in dollars per share) Basic (in dollars per share) Earnings Per Share, Diluted Diluted (in dollars per share) Diluted earnings (loss) per share (in dollars per share) Earnings Per Share, Diluted, Undistributed Diluted earnings (loss) per share (in dollars per share) Diluted (in dollars per share) Weighted Average Number of Shares Outstanding, Diluted [Abstract] Weighted average common shares outstanding: Weighted Average Number of Shares Outstanding, Basic Basic (in shares) Basic weighted average common shares outstanding Weighted Average Number of Shares Outstanding, Diluted Diluted (in shares) Diluted weighted average common shares outstanding Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] Comprehensive income Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Other comprehensive income (loss) Other comprehensive income (loss): Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax, Portion Attributable to Parent Net unrealized gains (losses) on investments Change in unrealized appreciation (depreciation) of investments, net of tax expense (benefit) of $2,825 in 2014, ($2,080) in 2013 and $333 in 2012 Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Other comprehensive income (loss) Total other comprehensive income (loss) Comprehensive Income (Loss), Net of Tax, Attributable to Parent Comprehensive income (loss) Other Comprehensive Income (Loss), Available-for-sale Securities, Tax, Portion Attributable to Parent Net unrealized (gains) losses on investments Change in unrealized appreciation (depreciation) of investments, tax expense (benefit) Consolidated Statements of Changes in Stockholders' Equity Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Common Stock [Member] Common Shares Additional Paid In Capital [Member] Additional Paid-In Capital Accumulated Other Comprehensive Income [Member] Accumulated Other Comprehensive Income (Loss) Retained Earnings [Member] Accumulated Deficit Treasury Stock [Member] Treasury Stock Increase (Decrease) in Stockholders' Equity [Roll Forward] Changes in Stockholders' Equity Stock Issued During Period, Value, New Issues Issuance of common shares net of issuance cost of $6,761 in 2014 and $25,546 in 2013, Common Shares; $1,143 in 2013, Class A and Class B-2 common shares; and $503 in 2012, Class A common shares Stock Issued During Period, Value, Conversion of Convertible Securities Conversion of Class A and Class B-2 common shares into Common Shares Stock Issued During Period, Value, Share-based Compensation, Gross Issuance of management incentive shares Stock Issued During Period, Value, Share-based Compensation, Forfeited Forfeiture of management incentive shares Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition Stock-based compensation expense Adjustments to Additional Paid in Capital, Income Tax Benefit from Share-based Compensation Excess tax benefits from stock-based compensation expense Treasury Stock, Value, Acquired, Cost Method Treasury stock acquired Treasury Stock, Retired, Cost Method, Amount Cancellation of treasury stock Represents information in the aggregate pertaining to Class A and Class B-2 classifications of common stock representing ownership interest in a corporation. Common Class A And Class B2 [Member] Class A and Class B-2 Common Shares Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs Common stock, issuance cost Consolidated Statements of Cash Flows Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Operating Activities Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Adjustments to reconcile net income (loss) to net cash provided by operating activities: Depreciation, Depletion and Amortization Depreciation and amortization Accretion Expense Amortization of discount on payments due under Asset Purchase Agreement Interest expense associated with the liability due Share-based Compensation Stock-based compensation expense Investment Income, Amortization of Premium Amortization of premium on investment securities Deferred Income Tax Expense (Benefit) Deferred Deferred income tax provision Excess Tax Benefit from Share-based Compensation, Operating Activities Excess tax benefits from stock-based compensation Increase (Decrease) in Operating Capital [Abstract] Change in: Changes in assets and liabilities: Increase (Decrease) in Accrued Investment Income Receivable Accrued investment income Increase (Decrease) in Accounts Receivable Accounts receivable Increase (Decrease) in Deferred Policy Acquisition Costs Deferred policy acquisition costs Represents, for a mortgage guaranty insurer, the increase (decrease) during the reporting period in the amount of investment in United States Mortgage Guaranty Tax and Loss Bonds issued by the Treasury Department for eligibility for certain tax deductions under enacted tax laws. Increase (Decrease) in Mortgage Guaranty Insurer United States Mortgage Guaranty Tax and Loss Bonds Prepaid federal income tax Net purchases of T&L Bonds Increase (Decrease) in Other Operating Assets Other assets Increase (Decrease) in Loss and Loss Adjustment Expense Reserve Reserve for losses and LAE Increase (Decrease) in Unearned Premiums Unearned premium reserve Increase (Decrease) in Accounts Payable and Accrued Liabilities Accounts payable and accrued expenses Net Cash Provided by (Used in) Operating Activities, Continuing Operations Net cash provided by operating activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Investing Activities Payments for (Proceeds from) Short-term Investments Net change in short-term investments Net change in short term investments Payments to Acquire Available-for-sale Securities Purchase of investments available for sale Proceeds from Maturities, Prepayments and Calls of Available-for-sale Securities Proceeds from maturity of investments available for sale Proceeds from Sale of Available-for-sale Securities Proceeds from sales of investments available for sale Payments to Acquire Property, Plant, and Equipment Purchase of property and equipment, net Net Cash Provided by (Used in) Investing Activities, Continuing Operations Net cash used in investing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Financing Activities Proceeds from Issuance of Common Stock Issuance of common shares net of costs Payments for Repurchase of Common Stock Treasury stock acquired Excess Tax Benefit from Share-based Compensation, Financing Activities Excess tax benefits from stock-based compensation Represents the cash outflow from the repayments of contractual obligations to seller arising from a purchase transaction. Repayments of Contractual Obligations to Seller Payments under Asset Purchase Agreement Payments made Represents the cash outflow for investor fee. Payments for Investor Fee Investor fee payment Net Cash Provided by (Used in) Financing Activities, Continuing Operations Net cash provided by financing activities Cash and Cash Equivalents, Period Increase (Decrease) Net (decrease) increase in cash Cash and Cash Equivalents, at Carrying Value Cash at end of year Cash at beginning of year Supplemental Cash Flow Information [Abstract] Supplemental Disclosure of Cash Flow Information Income Taxes Paid, Net Income tax (payments) refunds Noncash Investing and Financing Items [Abstract] Noncash Transactions Stock Issued Issuance of management incentive shares (see Note 10) Nature of Operations and Basis of Presentation Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Nature of Operations and Basis of Presentation Summary of Significant Accounting Policies Significant Accounting Policies [Text Block] Summary of Significant Accounting Policies Equity Transactions Stockholders' Equity Note Disclosure [Text Block] Equity Transactions Investments Available for Sale Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] Investments Available for Sale Accounts Receivable Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Accounts Receivable Triad Transaction Business Combination Disclosure [Text Block] Triad Transaction Reserve for Losses and Loss Adjustment Expenses Liability for Future Policy Benefits and Unpaid Claims Disclosure [Text Block] Reserve for Losses and Loss Adjustment Expenses Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Commitments and Contingencies Capital Stock The entire disclosure for the formation, structure, control and ownership of the entity common shares. Capital Stock Disclosure Text Block Capital Stock Stock-Based Compensation Disclosure of Compensation Related Costs, Share-based Payments [Text Block] Stock-Based Compensation Dividends Restrictions ScheduleOfDividendPaymentRestrictionsTextBlock Dividends Restrictions Income Taxes Income Tax Disclosure [Text Block] Income Taxes Related Party Transactions Related Party Transactions Disclosure [Text Block] Related Party Transactions Earnings (Loss) per Share (EPS) Earnings (Loss) Per Share [Text Block] Earnings (Loss) per Share (EPS) Accumulated Other Comprehensive Income Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated other comprehensive income (loss) Comprehensive Income (Loss) Note [Text Block] Accumulated Other Comprehensive Income Fair Value of Financial Instruments Fair Value Disclosures [Text Block] Fair Value of Financial Instruments Statutory Accounting Represents the entire disclosure pertaining to the statutory accounting. Statutory Accounting Disclosure [Text Block] Statutory Accounting Capital Maintenance Agreement The entire disclosure for the capital maintenance agreement under which the entity guaranty agreed to contribute funds, under specified conditions. Capital Maintenance Agreement Disclosure [Text Block] Capital Maintenance Agreement Quarterly Financial Data (Unaudited) Quarterly Financial Information [Text Block] Quarterly Financial Data (Unaudited) Schedule I-Summary of Investments-Other Than Investments in Related Parties Summary of Investments, Other than Investments in Related Parties [Text Block] Schedule I-Summary of Investments-Other Than Investments in Related Parties Schedule II-Financial Information of Registrant Condensed Financial Information of Parent Company Only Disclosure [Text Block] Schedule II-Financial Information of Registrant Use of Estimates, Policy [Policy Text Block] Use of Estimates Marketable Securities, Available-for-sale Securities, Policy [Policy Text Block] Investments Available for Sale Property, Plant and Equipment, Policy [Policy Text Block] Long-Lived Assets Deferred Policy Acquisition Costs, Policy [Policy Text Block] Deferred Policy Acquisition Costs Insurance Premiums Revenue Recognition, Policy [Policy Text Block] Insurance Premium Revenue Recognition