Investment Securities (Details) (USD $)	9 Months Ended
	Sep. 30, 2013 item	Dec. 31, 2012	Sep. 30, 2012
Investment securities available for sale:
Amortized Cost	$ 287,326,000	$ 82,189,000	$ 111,943,000
Unrealized Gain	900,000	2,360,000	2,801,000
Unrealized Loss	(5,380,000)	(483,000)	(494,000)
Estimated Fair Value	282,846,000	84,066,000	114,250,000
Stock, Estimated Fair Value
FHLB stock	7,500,000
Additional disclosures
Excess FHLB stock with the entity repurchased by FHLB through their stock repurchase program	3,000,000
Number of inverse putable reverse repurchase of the Bank's secured by collateral	3
Value of inverse putable reverse repurchases secured by collateral	28,500,000
U.S. Treasury
Investment securities available for sale:
Amortized Cost	73,000	147,000	147,000
Unrealized Gain	9,000	12,000	13,000
Estimated Fair Value	82,000	159,000	160,000
Municipal bonds
Investment securities available for sale:
Amortized Cost	95,971,000	25,401,000	55,445,000
Unrealized Gain	709,000	1,186,000	1,667,000
Unrealized Loss	(1,795,000)	(1,000)	(15,000)
Estimated Fair Value	94,885,000	26,586,000	57,097,000
Mortgage-backed securities
Investment securities available for sale:
Amortized Cost	191,282,000	56,641,000	56,351,000
Unrealized Gain	182,000	1,162,000	1,121,000
Unrealized Loss	(3,585,000)	(482,000)	(479,000)
Estimated Fair Value	187,879,000	57,321,000	56,993,000
Additional disclosures
Estimated par value of securities pledged as collateral for the Bank's inverse putable reverse repurchases	34,900,000
Fair value of securities pledged as collateral for the Bank's inverse putable reverse repurchases	$ 36,000,000