Guarantees (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014
Commitments to Extend Credit [Member]
Loan Commitments and Letters of Credit [Line Items]
Notional Amount	$ 259,634	$ 249,803	$ 235,549
Fair Value	0	0	0
Standby Letters of Credit [Member]
Loan Commitments and Letters of Credit [Line Items]
Notional Amount	3,193	3,317	3,333
Fair Value	$ 37	$ 39	$ 56