Fair Value Measurements Assets Measured at Fair Value on a Nonrecurring Basis (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
OREO	$ 10,684	$ 9,823
Fair Value, Measurements, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net loans	136,024	149,608
OREO	10,684	9,823
MSRs	38,228	37,663
Assets, Fair Value Disclosure	$ 184,936	$ 197,094