Investment Securities (Details) (USD $)	12 Months Ended
	Dec. 31, 2012 item	Dec. 31, 2011	Dec. 31, 2010
Investment securities available for sale:
Amortized Cost	$ 82,189,000	$ 115,106,000
Gross Unrealized Gain	2,360,000	1,437,000
Gross Unrealized Loss	(483,000)	(898,000)
Estimated Fair Value	84,066,000	115,645,000
Equities held at cost, Amortized Cost
FHLB stock	9,228,000	10,456,000
Federal Reserve Bank stock	2,019,000	2,019,000
Total equities held at cost	11,247,000	12,475,000
Equities held at cost, Estimated Fair Value
FHLB stock	9,228,000	10,456,000
Federal Reserve Bank stock	2,019,000	2,019,000
Total equities held at cost	11,247,000	12,475,000
Total securities
Amortized Cost	93,436,000	127,581,000
Estimated Fair Value	95,313,000	128,120,000
Additional disclosures
Excess FHLB stock with the entity repurchased by FHLB through their stock repurchase program	2,600,000	2,600,000
Number of inverse putable reverse repurchases of the Bank's secured by collateral	3
Value of inverse putable reverse repurchases secured by collateral	28,500,000
Number of private label MBS with OTTI	39
OTTI losses	159,000	617,000	1,087,000
U.S. Treasury
Investment securities available for sale:
Amortized Cost	147,000	147,000
Gross Unrealized Gain	12,000	15,000
Estimated Fair Value	159,000	162,000
Municipal bonds
Investment securities available for sale:
Amortized Cost	25,401,000	23,354,000
Gross Unrealized Gain	1,186,000	788,000
Gross Unrealized Loss	(1,000)	(3,000)
Estimated Fair Value	26,586,000	24,139,000
Mortgage-backed securities
Investment securities available for sale:
Amortized Cost	56,641,000	91,605,000
Gross Unrealized Gain	1,162,000	634,000
Gross Unrealized Loss	(482,000)	(895,000)
Estimated Fair Value	57,321,000	91,344,000
Additional disclosures
Estimated par value of securities pledged as collateral for the Bank's inverse putable reverse repurchases	43,400,000
Fair value of securities pledged as collateral for the Bank's inverse putable reverse repurchases	45,300,000
Book value of securities with OTTI	$ 823,000