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Security Types (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value	$ 111	$ 0
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value	1,830	414
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value	45,771	37,709
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	211,763	261,459
Available-for-sale Securities, Fair Value, Total	259,475	299,582
Available-for-sale Securities, Gross Unrealized Gain (Loss)	8,534	7,241
Available-for-sale Securities, Gross Unrealized Losses	335	551
Available-for-sale Securities, Amortized Cost Basis	251,276	292,892
US Government and Government Agencies and Authorities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value	0	0
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value	0	0
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value	20,065	5,013
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	19,460	46,072
Available-for-sale Securities, Fair Value, Total	39,525	51,085
Available-for-sale Securities, Gross Unrealized Gain (Loss)	187	182
Available-for-sale Securities, Gross Unrealized Losses	19	1
Available-for-sale Securities, Amortized Cost Basis	39,357	50,904
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value	0	0
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value	0	0
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value	4,700	14,935
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	136,760	149,863
Available-for-sale Securities, Fair Value, Total	141,460	164,798
Available-for-sale Securities, Gross Unrealized Gain (Loss)	3,012	2,534
Available-for-sale Securities, Gross Unrealized Losses	162	129
Available-for-sale Securities, Amortized Cost Basis	138,610	162,393
US States and Political Subdivisions Debt Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value	111	0
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value	1,830	414
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value	21,006	17,761
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	54,891	63,538
Available-for-sale Securities, Fair Value, Total	77,838	81,713
Available-for-sale Securities, Gross Unrealized Gain (Loss)	5,222	4,339
Available-for-sale Securities, Gross Unrealized Losses	0	48
Available-for-sale Securities, Amortized Cost Basis	72,616	77,422
Trust Preferred Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value	0	0
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value	0	0
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value	0	0
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	652	1,986
Available-for-sale Securities, Fair Value, Total	652	1,986
Available-for-sale Securities, Gross Unrealized Gain (Loss)	113	186
Available-for-sale Securities, Gross Unrealized Losses	154	373
Available-for-sale Securities, Amortized Cost Basis	$ 693	$ 2,173

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