Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Investment securities:
Held-to-maturity, at fair value	$ 49,977	$ 53,937
Stockholders Equity
Convertible preferred stock, no par value (in dollars per share)	$ 0us-gaap_PreferredStockNoParValue	$ 0us-gaap_PreferredStockNoParValue
Convertible preferred stock, authorized (in shares)	1,000,000us-gaap_PreferredStockSharesAuthorized	1,000,000us-gaap_PreferredStockSharesAuthorized
Convertible preferred stock, issued (in shares)	5,500us-gaap_PreferredStockSharesIssued	5,500us-gaap_PreferredStockSharesIssued
Common stock, par value (in dollars per share)	$ 4	$ 4
Common stock, authorized (in shares)	18,000,000us-gaap_CommonStockSharesAuthorized	18,000,000us-gaap_CommonStockSharesAuthorized
Common stock, issued (in shares)	7,542,700us-gaap_CommonStockSharesIssued	7,529,815us-gaap_CommonStockSharesIssued
Treasury stock (in shares)	539,015us-gaap_TreasuryStockShares	496,497us-gaap_TreasuryStockShares

Face amount or stated value per share of common stock.

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