Investment Securities (Details 3) (USD $) In Thousands, unless otherwise specified	Sep. 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	$ 280,327	$ 338,685
Total fair value securities	284,963	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	1,697	1,033
Amortized cost due in five through ten years	8,353	11,768
Fair value due in five through ten years	8,767	12,083
Amortized cost due after ten year	14,802	14,876
Fair value due after ten year	15,306	15,350
Total fair value securities	25,770	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	1,039
Fair value due in one through five years	1,057
Amortized cost due in five through ten years	28,453	7,415
Fair value due in five through ten years	29,391	7,490
Amortized cost due after ten year	73,729	123,534
Fair value due after ten year	74,277	124,802
Total fair value securities	104,725	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	4,855	2,967
Fair value due in five through ten years	4,947	3,007
Amortized cost due after ten year	120,450	143,228
Fair value due after ten year	122,294	143,630
Total fair value securities	127,241	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	19,554	13,338
Fair value due in one through five years	19,663	13,081
Amortized cost due in five through ten years	7,487	19,345
Fair value due in five through ten years	$ 7,564	$ 17,690