Commitments and Contingencies (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2012
Commitments and Contingencies (Additional Textual) [Abstract]
Reserve for sold mortgages	$ 131,000
Notional amount of RPAs	22,900,000
Negative fair value of RPAs	2,200,000
Cash pledged to participant financial institutions as collateral for RPAs	1,600,000
Approximate payment required in event of default of RPAs	2,200,000
Fair value of risk participation agreement guarantee	89,000
Future Rental Income Receivable Under Subleases	570,000
Maximum [Member]
Commitments and Contingencies (Textual) [Abstract]
Term of letter of credit	5 years
Terms of the underlying swaps	13 years
Amount of future payments under letters of credit	48,900,000
Minimum [Member]
Commitments and Contingencies (Textual) [Abstract]
Term of letter of credit	1 year
Terms of the underlying swaps	3 years
Letter of Credit [Member]
Commitments and Contingencies (Textual) [Abstract]
Current carrying amount of the contingent obligation	$ 229,000