Consolidated Balance Sheets (Parentheticals) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Balance Sheet Related Disclosures [Abstract]
Fixed maturities, held-to-maturity securities, fair value	$ 370	$ 404
Fixed maturities, available-for-sale securities, amortized cost	2,727,434	2,773,566
Equity securities, trading securities, fair value	14,495	14,363
Equity securities, available-for-sale securities, amortized cost	72,238	71,651
Equity securities, trading securities, amortized cost	3,445us-gaap_TradingSecuritiesEquityCost	3,708us-gaap_TradingSecuritiesEquityCost
Allowance for doubtful accounts	746	618
Property and equipment accumulated depreciation	$ 42,811	$ 41,492
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	75,000,000us-gaap_CommonStockSharesAuthorized	75,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	25,006,049us-gaap_CommonStockSharesIssued	25,019,415us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	25,006,049us-gaap_CommonStockSharesOutstanding	25,019,415us-gaap_CommonStockSharesOutstanding

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Fair value of investments in debt securities classified as held-to-maturity.

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The carrying value as of the balance sheet date of the estimated valuation allowance to reduce gross premiums receivable to net realizable value.

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Cost of investments in equity securities and other forms of securities that provide ownership interests classified as trading.

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