Investment Securities (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Securities Available for Sale:
Amortized Cost	$ 292,348		$ 300,998
Gross Unrealized Gains	3,059		3,408
Gross Unrealized Losses	(462)		(515)
Fair Value	294,945		303,891
Securities Held to Maturity:
Fair Value	45		46
Available-for-sale Amortized Cost [Abstract]
Due Less Than One Year	125
Due After One Year Through Five Years	2,351
Due After Five Years Through Ten Years	5,690
Due After Ten Years	890
Total	9,056
Mortgage-Backed Securities	283,292
Amortized Cost	292,348		300,998
Available-for-sale Fair Value [Abstract]
Due Less Than One Year	127
Due After One Year Through Five Years	2,495
Due After Five Years Through Ten Years	5,925
Due After Ten Years	667
Total	9,214
Mortgage-Backed Securities	285,731
Fair Value	294,945		303,891
Held-to-maturity Amortized Cost [Abstract]
Due Less Than One Year	0
Due After One Year Through Five Years	44
Due After Five Years Through Ten Years	0
Due After Ten Years	0
Total	44
Mortgage-Backed Securities	0
Amortized Cost	44
Held-to-maturity Fair Value [Abstract]
Due Less Than One Year	0
Due After One Year Through Five Years	45
Due After Five Years Through Ten Years	0
Due After Ten Years	0
Total	45
Mortgage-Backed Securities	0
Fair Value	45		46
Proceeds from sale of investment securities available for sale	60,654	154,560
Available-for-sale securities, gross realized gains	990	1,133
Available-for-sale securities, gross realized losses	(110)	(1)
Other than temporary impairment charges	(60)
Fair value of securities on nonaccrual status	132	132
Investment securities pledged	105,336	136,838
Continuous unrealized loss position [Abstract]
Less Than 12 Months, Fair value	60,081		27,664
12 Months or Greater, Fair value	207		1,195
Total, Fair Value	60,288		28,859
Less Than 12 Months, Gross Unrealized Losses	(227)		(209)
12 Months or Greater, Gross Unrealized Losses	(235)		(306)
Total, Unrealized Losses	(462)		(515)
Debt securities with unrealized losses, depreciated (in hundredth)	0.76%
Number of asset-backed security owned	1
Periods for asset-backed security in continuous unrealized loss position, minimum	12 years
Number of issuance of trust preferred security	1
Book value of trust preferred security	367
Unrealized loss on trust preferred security	235
Other than temporary impairment written off	60
US Government Agencies Mortgage-Backed [Member]
Securities Available for Sale:
Amortized Cost	283,292		291,097
Gross Unrealized Gains	2,665		3,152
Gross Unrealized Losses	(226)		(188)
Fair Value	285,731		294,061
Available-for-sale Amortized Cost [Abstract]
Amortized Cost	283,292		291,097
Available-for-sale Fair Value [Abstract]
Fair Value	285,731		294,061
Continuous unrealized loss position [Abstract]
Less Than 12 Months, Fair value	59,875		26,440
12 Months or Greater, Fair value	0		0
Total, Fair Value	59,875		26,440
Less Than 12 Months, Gross Unrealized Losses	(226)		(188)
12 Months or Greater, Gross Unrealized Losses	0		0
Total, Unrealized Losses	(226)		(188)
State, County & Municipal [Member]
Securities Available for Sale:
Amortized Cost	7,689		7,475
Gross Unrealized Gains	279		132
Gross Unrealized Losses	(1)		(23)
Fair Value	7,967		7,584
Securities Held to Maturity:
Amortized Cost	44		46
Gross Unrealized Gains	1		0
Gross Unrealized Losses	0		0
Fair Value	45		46
Available-for-sale Amortized Cost [Abstract]
Amortized Cost	7,689		7,475
Available-for-sale Fair Value [Abstract]
Fair Value	7,967		7,584
Held-to-maturity Fair Value [Abstract]
Fair Value	45		46
Continuous unrealized loss position [Abstract]
Less Than 12 Months, Fair value	206		1,224
12 Months or Greater, Fair value	75		73
Total, Fair Value	281		1,297
Less Than 12 Months, Gross Unrealized Losses	(1)		(21)
12 Months or Greater, Gross Unrealized Losses	0		(2)
Total, Unrealized Losses	(1)		(23)
Corporate Obligations [Member]
Securities Available for Sale:
Amortized Cost	1,000		2,000
Gross Unrealized Gains	115		124
Gross Unrealized Losses	0		(10)
Fair Value	1,115		2,114
Available-for-sale Amortized Cost [Abstract]
Amortized Cost	1,000		2,000
Available-for-sale Fair Value [Abstract]
Fair Value	1,115		2,114
Continuous unrealized loss position [Abstract]
Less Than 12 Months, Fair value	0		0
12 Months or Greater, Fair value	0		990
Total, Fair Value	0		990
Less Than 12 Months, Gross Unrealized Losses	0		0
12 Months or Greater, Gross Unrealized Losses	0		(10)
Total, Unrealized Losses	0		(10)
Asset-Backed Securities [Member]
Securities Available for Sale:
Amortized Cost	367		426
Gross Unrealized Gains	0		0
Gross Unrealized Losses	(235)		(294)
Fair Value	132		132
Available-for-sale Amortized Cost [Abstract]
Amortized Cost	367		426
Available-for-sale Fair Value [Abstract]
Fair Value	132		132
Continuous unrealized loss position [Abstract]
Less Than 12 Months, Fair value	0		0
12 Months or Greater, Fair value	132		132
Total, Fair Value	132		132
Less Than 12 Months, Gross Unrealized Losses	0		0
12 Months or Greater, Gross Unrealized Losses	(235)		(294)
Total, Unrealized Losses	$ (235)		$ (294)