Investment Securities (Details 3) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Aggregate amortized cost and fair value of the available-for-sale securities portfolio by remaining contractual maturity
Total amortized cost securities	$ 346,271	$ 338,685
Total fair value securities	350,779	339,450
Government-sponsored enterprises and FFCB bonds [Member]
Aggregate amortized cost and fair value of the available-for-sale securities portfolio by remaining contractual maturity
Amortized cost due in one through five years		3
Fair value due in one through five years		28
Amortized cost due in five through ten years		1,000
Fair value due in five through ten years		1,004
Total fair value securities		1,032
Obligations of states and political subdivisions [Member]
Aggregate amortized cost and fair value of the available-for-sale securities portfolio by remaining contractual maturity
Amortized cost due in one year or less		250
Fair value due in one year or less		252
Amortized cost due in one through five years	1,605	961
Fair value due in one through five years	1,704	1,033
Amortized cost due in five through ten years	20,196	11,768
Fair value due in five through ten years	20,930	12,083
Amortized cost due after ten year	14,854	14,876
Fair value due after ten year	15,145	15,350
Total fair value securities	37,779	28,718
Mortgage-backed securities [Member]
Aggregate amortized cost and fair value of the available-for-sale securities portfolio by remaining contractual maturity
Amortized cost due in one through five years	1,044
Fair value due in one through five years	1,044
Amortized cost due in five through ten years	27,230	7,415
Fair value due in five through ten years	27,488	7,490
Amortized cost due after ten year	102,896	123,534
Fair value due after ten year	104,267	124,802
Total fair value securities	132,799	132,292
SBA- backed securities [Member]
Aggregate amortized cost and fair value of the available-for-sale securities portfolio by remaining contractual maturity
Amortized cost due in five through ten years	5,190	2,967
Fair value due in five through ten years	5,224	3,007
Amortized cost due after ten year	132,255	143,228
Fair value due after ten year	134,378	143,630
Total fair value securities	139,602	146,637
Corporate Bond [Member]
Aggregate amortized cost and fair value of the available-for-sale securities portfolio by remaining contractual maturity
Amortized cost due in one through five years	23,326	13,338
Fair value due in one through five years	23,271	13,081
Amortized cost due in five through ten years	17,675	19,345
Fair value due in five through ten years	$ 17,328	$ 17,690