Commitments and Contingencies (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Contingencies
Total accrued loss contingencies for all legal claims	$ 305,000	$ 250,000	$ 265,000
Commitments to extend credit
Commitments and Contingencies
Commitments outstanding	313,875,000	348,375,000
Standby letters of credit
Commitments and Contingencies
Commitments outstanding	14,771,000	8,687,000
Commercial letters of credit
Commitments and Contingencies
Commitments outstanding	15,844,000	12,769,000
Commitments to fund investments in affordable housing partnerships
Commitments and Contingencies
Commitments outstanding	9,490,000	10,237,000
Operating lease commitments
Commitments and Contingencies
Commitments outstanding	$ 19,961,000	$ 23,786,000