Investment Securities (Details 3) (USD $)	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Investment securities available for sale, Amortized Cost
More than One Year to Five Years	$ 10,068,000
More than Five Years to Ten Years	56,887,000
More than Ten Years	220,371,000
Total	287,326,000
Investment securities available for sale, Fair Value
More than One Year to Five Years	9,987,000
More than Five Years to Ten Years	56,430,000
More than Ten Years	216,429,000
Total	282,846,000	84,066,000	114,250,000
Accumulated other comprehensive income (loss)	(4,500,000)	1,900,000
Accumulated other comprehensive income (loss), net of tax	(2,637,000)	1,105,000	1,358,000
U.S. Treasury
Investment securities available for sale, Amortized Cost
More than One Year to Five Years	73,000
Total	73,000
Investment securities available for sale, Fair Value
More than One Year to Five Years	82,000
Total	82,000
Municipal bonds
Investment securities available for sale, Amortized Cost
More than One Year to Five Years	9,995,000
More than Five Years to Ten Years	42,734,000
More than Ten Years	43,242,000
Total	95,971,000
Investment securities available for sale, Fair Value
More than One Year to Five Years	9,905,000
More than Five Years to Ten Years	42,392,000
More than Ten Years	42,588,000
Total	94,885,000
Mortgage-backed securities
Investment securities available for sale, Amortized Cost
More than Five Years to Ten Years	14,153,000
More than Ten Years	177,129,000
Total	191,282,000
Investment securities available for sale, Fair Value
More than Five Years to Ten Years	14,038,000
More than Ten Years	173,841,000
Total	$ 187,879,000