Off-Balance Sheet Risk, Commitments and Contingencies (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Loan commitments and undisbursed lines of credit
Commitments and Contingencies
Fair value disclosure, off-balance sheet risks, amount, liability	$ 255,356,000	$ 255,586,000
Undisbursed standby letters of credit
Commitments and Contingencies
Fair value disclosure, off-balance sheet risks, amount, liability	7,395,000	5,654,000
Undisbursed portion of construction loans
Commitments and Contingencies
Fair value disclosure, off-balance sheet risks, amount, liability	17,501,000	6,172,000
Commitments to close first mortgages
Commitments and Contingencies
Fair value disclosure, off-balance sheet risks, amount, liability	46,726,000	22,271,000
Commitments to sell first mortgages
Commitments and Contingencies
Fair value disclosure, off-balance sheet risks, amount, liability	$ 71,491,707	$ 41,805,000