Capital Adequacy and Regulatory and Supervisory Matters (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2011	Jan. 21, 2011	Jun. 30, 2012 Bank [Member]	Dec. 31, 2011 Bank [Member]
Capital Ratios of Company's Subsidiary Bank
Total capital			$ 12,602	$ 13,756
Total capital ( to risk-weighted assets)	5.60%	12.00%	5.60%	6.10%
Tier I capital			9,767	10,860
Tier I ( to risk-weighted assets)			4.40%	4.80%
Tier I capital			$ 9,767	$ 18,060
Tier I capital ( to average assets)	2.90%	8.00%	2.90%	3.30%