Federal Home Loan Bank Advances (Details) (USD $)						0 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 OAK [Member]	Apr. 30, 2010 OAK [Member]	Dec. 31, 2012 Real Estate Residential Loans [Member]	Jan. 20, 2013 Subsequent Event [Member]
Schedule of Federal Home Loan Bank Advances [Line Items]
Fixed-rate FHLB advances	$ 34,289,000	$ 43,057,000	$ 9,300,000
Fixed-rate FHLB advances, weighted average interest rate at year end	2.69%	2.55%
Carrying value of FHLB collateral					829,000,000
FHLB advances assumed, OAK acquisition				35,900,000
FHLB advances additional borrowing capacity	309,000,000
FHLB advance prepayment penalties						$ 800,000