Business Combinations - Summary of Fair Value Adjustments (Details) - USD ($) $ in Thousands			12 Months Ended
	Dec. 01, 2014	Apr. 01, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Bargain purchase gain			$ 0	$ 3,001	$ 0
Goodwill			(22,334)	(22,334)
Alaska Pacific Bank
Business Acquisition [Line Items]
Cost basis net assets		$ 14,733
Cash payment made		(6,423)
Common stock issued		(7,446)
Net loans		(1,137)
Premises and equipment		547
Other intangible assets		623
Mortgage servicing rights		(119)
Deposits		(844)
Other		236
Bargain purchase gain		$ 170
RML
Business Acquisition [Line Items]
Cost basis net assets	$ 11,915
Cash payment made	(18,240)
Cash surrender value of life insurance paid	(3,896)
Liability for future earn out payments	(7,318)		$ (6,600)	$ (7,300)
Net loans	(360)
Other intangible assets	950
Rate lock derivative asset	960
Investment in Homestate	1,490
Other	(311)
Goodwill	$ (14,810)