Business Combinations - Summary of Fair Value Adjustments (Details) - USD ($) $ in Thousands	Dec. 02, 2014	Apr. 01, 2014	Jun. 30, 2015	Dec. 31, 2014	Apr. 02, 2014
Business Acquisition [Line Items]
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
Residential Mortgage Holding Company
Business Acquisition [Line Items]
Cost basis net assets	$ 11,915
Cash payment made	(18,240)
Net loans	(360)
Other intangible assets	950
Other	(311)
Cash surrender value of life insurance paid	(3,896)
Liability for future earn out payments	(7,318)		$ (9,500)
Rate lock derivative asset	960
Investment in Homestate Mortgage, LLC	1,490
Goodwill	$ (14,810)