Investment Securities (Details 3) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Gross unrealized losses and fair value, aggregated by investment category
Less than 12 months, Fair Value	$ 4,918	$ 20,385
12 months or more, Fair Value	21,205	2,412
Fair Value, Total	26,123	22,797
Unrealized Losses, Total	(356)	(962)
Less than 12 months, Unrealized Losses	(89)	(785)
12 months or more, Unrealized Losses	(267)	(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	6	166
12 months or more, Fair Value	440	412
Fair Value, Total	446	578
Unrealized Losses, Total	(27)	(107)
Less than 12 months, Unrealized Losses	(1)	(1)
12 months or more, Unrealized Losses	(26)	(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	1,005	2,000
Fair Value, Total	1,005	2,000
Unrealized Losses, Total	(1)	(71)
Less than 12 months, Unrealized Losses	0	0
12 months or more, Unrealized Losses	(1)	(71)
Corporate notes [Member]
Gross unrealized losses and fair value, aggregated by investment category
Less than 12 months, Fair Value	4,912	19,218
12 months or more, Fair Value	19,760	0
Fair Value, Total	24,672	19,218
Unrealized Losses, Total	(328)	(783)
Less than 12 months, Unrealized Losses	(88)	(783)
12 months or more, Unrealized Losses	$ (240)	$ 0