Commitments and Contingencies Commitments (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Off-balance Sheet Risks, Disclosure Information [Line Items]
Loan commitments	$ 567,353	$ 455,719
Commitments to extend credit [Member]
Off-balance Sheet Risks, Disclosure Information [Line Items]
Loan commitments	558,633	441,124
Standby letters of credit [Member]
Off-balance Sheet Risks, Disclosure Information [Line Items]
Loan commitments	8,720	$ 14,595
Home equity [Member] | Commitments to extend credit [Member] | Commitments to extend credit, expiration within ten years [Member]
Off-balance Sheet Risks, Disclosure Information [Line Items]
Loan commitments	$ 15,206