Mortgage Servicing Rights - Mortgage Servicing Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance, beginning of period	$ 1,010
Changes in fair value:
Carrying value, December 31	1,654	$ 1,010
Balance of loans serviced for others	$ 125,446	$ 96,390
MSR as a percentage of serviced loans	1.32%	1.05%
Mortgage servicing rights
Servicing Asset at Fair Value, Amount [Roll Forward]
Balance, beginning of period	$ 1,010	$ 0
Addition to servicing asset	802	0
Changes in fair value:
Due to changes in model inputs of assumptions	29	0
Other	(187)	(160)
Carrying value, December 31	1,654	1,010
Alaska Pacific Bank | Mortgage servicing rights
Servicing Asset at Fair Value, Amount [Roll Forward]
Addition to servicing asset	$ 0	$ 1,170