Securities (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 366,127	$ 388,337
Gross Unrealized Gains	5,855	5,219
Gross Unrealized Losses	(2,063)	(3,727)
Fair Value	369,919us-gaap_AvailableForSaleSecurities	389,829us-gaap_AvailableForSaleSecurities
Corporate bonds
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	935	936
Gross Unrealized Gains	9	3
Gross Unrealized Losses	(3)	(8)
Fair Value	941	931
U.S. Treasury and U.S. government sponsored entities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	18,812	24,515
Gross Unrealized Gains	401	418
Gross Unrealized Losses	(7)	(112)
Fair Value	19,206	24,821
State and political subdivisions
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	94,081	90,369
Gross Unrealized Gains	1,890	2,183
Gross Unrealized Losses	(393)	(671)
Fair Value	95,578	91,881
Mortgage-backed securities - residential
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	215,561	223,216
Gross Unrealized Gains	3,431	2,395
Gross Unrealized Losses	(688)	(1,249)
Fair Value	218,304	224,362
Collateralized mortgage obligations
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	14,872	25,988
Gross Unrealized Gains	0	98
Gross Unrealized Losses	(507)	(911)
Fair Value	14,365	25,175
Small Business Administration
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	21,745	23,193
Gross Unrealized Gains	1	1
Gross Unrealized Losses	(463)	(775)
Fair Value	21,283	22,419
Equity securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	121	120
Gross Unrealized Gains	123	121
Gross Unrealized Losses	(2)	(1)
Fair Value	$ 242	$ 240

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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