Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Securities held to maturity fair values	$ 182,411	$ 56,700
Preferred stock, shares authorized	5,000,000us-gaap_PreferredStockSharesAuthorized	5,000,000us-gaap_PreferredStockSharesAuthorized
common stock, shares authorized	40,000,000us-gaap_CommonStockSharesAuthorized	40,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	19,709,881us-gaap_CommonStockSharesIssued	19,679,659us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	19,709,881us-gaap_CommonStockSharesOutstanding	19,679,659us-gaap_CommonStockSharesOutstanding
Series B Preferred Stock [Member]
Preferred stock, shares issued	63,500	63,500
Preferred stock, shares outstanding	63,500	63,500
Series C Preferred Stock [Member]
Preferred stock, shares issued	728,706	728,706
Preferred stock, shares outstanding	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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Fair value of investments in debt securities classified as held-to-maturity.

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