Investments (Details 2) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Amortized cost and fair values of investment securities available-for-sale
Fair Value	$ 109,829	$ 79,502
Debt Securities
Amortized cost and fair values of investment securities available-for-sale
Amortized Cost	111,768	79,102
Unrealized Gain	196	575
Unrealized Loss	(2,135)	(175)
Fair Value	109,829	79,502
U.S. Agency securities
Amortized cost and fair values of investment securities available-for-sale
Amortized Cost	61,078	21,951
Unrealized Gain	73	247
Unrealized Loss	(1,362)	(6)
Fair Value	59,789	22,192
Mortgage-backed securities
Amortized cost and fair values of investment securities available-for-sale
Amortized Cost	49,756	56,217
Unrealized Gain	123	328
Unrealized Loss	(773)	(169)
Fair Value	49,106	56,376
Other securities
Amortized cost and fair values of investment securities available-for-sale
Amortized Cost	934	934
Fair Value	$ 934	$ 934