Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Securities held to maturity fair values	$ 174,756	$ 182,411	$ 57,192
Preferred stock, shares authorized	5,000,000us-gaap_PreferredStockSharesAuthorized	5,000,000us-gaap_PreferredStockSharesAuthorized	5,000,000us-gaap_PreferredStockSharesAuthorized
common stock, shares authorized	40,000,000us-gaap_CommonStockSharesAuthorized	40,000,000us-gaap_CommonStockSharesAuthorized	40,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	19,740,183us-gaap_CommonStockSharesIssued	19,709,881us-gaap_CommonStockSharesIssued	19,695,316us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	19,740,183us-gaap_CommonStockSharesOutstanding	19,709,881us-gaap_CommonStockSharesOutstanding	19,695,316us-gaap_CommonStockSharesOutstanding
Series B Preferred Stock [Member]
Preferred stock, shares issued	63,500	63,500	63,500
Preferred stock, shares outstanding	63,500	63,500	63,500
Series C Preferred Stock [Member]
Preferred stock, shares issued	728,706	728,706	728,706
Preferred stock, shares outstanding	728,706	728,706	728,706

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 maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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