Investment Securities (Details 3) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Gross unrealized losses and fair value, aggregated by investment category
Less than 12 months, Fair Value	$ 34,712	$ 20,385
12 months or more, Fair Value	1,428	2,412
Fair Value, Total	36,140	22,797
Unrealized Losses, Total	(916)	(962)
Less than 12 months, Unrealized Losses	(839)	(785)
12 months or more, Unrealized Losses	(77)	(177)
U.S. Treasury and government agency [Member]
Gross unrealized losses and fair value, aggregated by investment category
Less than 12 months, Fair Value		1,001
12 months or more, Fair Value		0
Fair Value, Total		1,001
Unrealized Losses, Total		(1)
Less than 12 months, Unrealized Losses		(1)
12 months or more, Unrealized Losses		0
Mortgage-backed Securities [Member]
Gross unrealized losses and fair value, aggregated by investment category
Less than 12 months, Fair Value	10,509	166
12 months or more, Fair Value	425	412
Fair Value, Total	10,934	578
Unrealized Losses, Total	(113)	(107)
Less than 12 months, Unrealized Losses	(42)	(1)
12 months or more, Unrealized Losses	(71)	(106)
Municipal securities [Member]
Gross unrealized losses and fair value, aggregated by investment category
Less than 12 months, Fair Value	0	0
12 months or more, Fair Value	1,003	2,000
Fair Value, Total	1,003	2,000
Unrealized Losses, Total	(6)	(71)
Less than 12 months, Unrealized Losses	0	0
12 months or more, Unrealized Losses	(6)	(71)
Corporate notes [Member]
Gross unrealized losses and fair value, aggregated by investment category
Less than 12 months, Fair Value	24,203	19,218
12 months or more, Fair Value	0	0
Fair Value, Total	24,203	19,218
Unrealized Losses, Total	(797)	(783)
Less than 12 months, Unrealized Losses	(797)	(783)
12 months or more, Unrealized Losses	$ 0	$ 0