Securities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 410,885	$ 431,522
Gross Unrealized Gains	4,775	3,489
Gross Unrealized Losses	(6,375)	(12,026)
Fair Value	409,285	422,985
Corporate bonds
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	1,842	1,540
Gross Unrealized Gains	5	0
Gross Unrealized Losses	(7)	(15)
Fair Value	1,840	1,525
U.S. Treasury and U.S. government sponsored entities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	27,678	50,942
Gross Unrealized Gains	582	755
Gross Unrealized Losses	(167)	(387)
Fair Value	28,093	51,310
State and political subdivisions
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	88,247	96,239
Gross Unrealized Gains	1,931	1,302
Gross Unrealized Losses	(1,289)	(2,807)
Fair Value	88,889	94,734
Mortgage-backed securities - residential
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	240,359	226,865
Gross Unrealized Gains	2,008	1,199
Gross Unrealized Losses	(2,294)	(5,084)
Fair Value	240,073	222,980
Collateralized mortgage obligations
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	28,205	30,227
Gross Unrealized Gains	162	162
Gross Unrealized Losses	(1,293)	(1,713)
Fair Value	27,074	28,676
Small business administration
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	24,436	25,592
Gross Unrealized Gains	1	1
Gross Unrealized Losses	(1,325)	(2,020)
Fair Value	23,112	23,573
Equity securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	118	117
Gross Unrealized Gains	86	70
Gross Unrealized Losses	0	0
Fair Value	$ 204	$ 187