Securities (Investments Classified by Contractual Maturity Date) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Schedule of Investments [Line Items]
Available-for-sale Securities, Debt Maturities, within One Year, Amortized Cost Basis	$ 2,319
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Amortized Cost Basis	31,788
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Amortized Cost Basis	36,742
Available-for-sale Securities, Debt Maturities, after Ten Years, Amortized Cost Basis	4,028
Available-for-sale Securities, Amortized Cost Basis	144,696		157,288
Available-for-sale Securities, Debt Maturities, within One Year, Fair Value	2,342
Available-for-sale Securities, Debt Maturities, after One Through Five Years, Fair Value	33,545
Available-for-sale Securities, Debt Maturities, after Five Through Ten Years, Fair Value	38,023
Available-for-sale Securities, Debt Maturities, after Ten Years, Fair Value	4,275
Available-for-sale Securities	152,518	206,912	165,790
Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Net Carrying Amount	19,095
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Net Carrying Amount	11,004
Held-to-maturity Securities	61,262	10,028	50,159
Held-to-maturity Securities, Debt Maturities, after One Through Five Years, Fair Value	19,402
Held-to-maturity Securities, Debt Maturities, after Five Through Ten Years, Fair Value	11,025
Held-to-maturity Securities, Fair Value	61,743	10,641	50,980
Available-for-sale Securities, Gross Realized Gains	0	4
Available-for-sale Securities, Gross Realized Losses	0	0
Available-for-sale Securities Pledged as Collateral	136,988		147,923
Mortgage-backed securities [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost Basis	68,148
Available-for-sale Securities, Amortized Cost Basis	68,148		75,816
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	72,393
Available-for-sale Securities	72,393		80,583
Held-to-maturity Securities, Debt Maturities, without Single Maturity Date, Net Carrying Amount	31,163
Held-to-maturity Securities	31,163		20,044
Held-to-maturity Securities, Debt Maturities, without Single Maturity Date, Fair Value	31,316
Held-to-maturity Securities, Fair Value	31,316		20,335
CRA mutual fund [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost Basis	1,044
Available-for-sale Securities, Amortized Cost Basis	1,044		1,044
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	1,087
Available-for-sale Securities	1,087		1,096
Stock in other banks [Member]
Schedule of Investments [Line Items]
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Amortized Cost Basis	627
Available-for-sale Securities, Amortized Cost Basis	627		627
Available-for-sale Securities, Debt Maturities, without Single Maturity Date, Fair Value	853
Available-for-sale Securities	$ 853		$ 780