Commitments and Contingencies (Details) (USD $)						12 Months Ended
	Dec. 31, 2013	Dec. 31, 2013 Commitments to Extend Credit [Member]	Dec. 31, 2012 Commitments to Extend Credit [Member]	Dec. 31, 2013 Letters of Credit [Member]	Dec. 31, 2012 Letters of Credit [Member]	Dec. 31, 2013 Letters of Credit [Member] Minimum [Member]	Dec. 31, 2013 Letters of Credit [Member] Maximum [Member]	Dec. 31, 2013 Performance Guarantees Under Interest Rate Swap Contracts Entered Into Between Our Borrowing Customers and Third Parties [Member]	Dec. 31, 2012 Performance Guarantees Under Interest Rate Swap Contracts Entered Into Between Our Borrowing Customers and Third Parties [Member]
Off-balance sheet risks [Line Items]
Off-balance sheet risks, amount, liability		$ 445,294,000	$ 334,772,000	$ 7,393,000	$ 5,281,000			$ 0	$ 1,796,000
Off balance sheet risks maturity period						1 month	58 months
Minimum future rental commitments under noncancellable operating leases [Abstract]
2014	341,000
2015	344,000
2016	187,000
2017	87,000
2018	$ 77,000