Mortgage Servicing Rights, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Servicing Asset at Amortized Value, Balance [Roll Forward]
Servicing Asset at Amortized Cost, Beginning	$ 1,952	$ 2,316
Servicing Asset at Amortized Value, Additions	224	324
Servicing Asset at Amortized Value, Amortization	(533)	(687)
Servicing Asset at Amortized Value, Valuation Allowance	1	(1)
Servicing Asset at Amortized Cost, Ending	1,644	1,952
Valuation Allowance for Impairment of Recognized Servicing Assets, Balance [Abstract]
Valuation Allowance for Impairment of Recognized Servicing Assets, Beginning Balance	1	0
Valuation Allowance for Impairment of Recognized Servicing Assets, Ending Balance	0	1
Servicing Asset at Amortized Value, Fair Value [Abstract]
Servicing Asset at Amortized Value, Fair Value, Beginning	2,678	3,086
Servicing Asset at Amortized Value, Fair Value, Ending	$ 2,528	$ 2,678