Commitments and Contingencies (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Commitments To Extend Credit [Member] | Home Equity [Member]
Other Commitments [Line Items]
Contractual obligations	$ 188,498	$ 185,553
Commitments To Extend Credit [Member] | Commercial Real Estate [Member]
Other Commitments [Line Items]
Contractual obligations	79,584	98,883
Commitments To Extend Credit [Member] | Other Commitments [Member]
Other Commitments [Line Items]
Contractual obligations	205,652	203,103
Standby Letters Of Credit [Member]
Other Commitments [Line Items]
Contractual obligations	5,012	5,014
Letter of Credit [Member]
Other Commitments [Line Items]
Contractual obligations	$ 1,443	$ 1,859