Business Combinations - Narrative (Details)				1 Months Ended	3 Months Ended	12 Months Ended
	Dec. 01, 2014 USD ($)	Nov. 30, 2014 USD ($)	Apr. 01, 2014 USD ($) purchased_loan $ / shares shares	Dec. 31, 2014 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Business Acquisition [Line Items]
Bargain purchase gain						$ 0	$ 3,001,000	$ 0
Merger and acquisition expense						0	1,962,000	536,000
Gain on purchase of mortgage affiliate						0	3,001,000	0
Goodwill				$ 22,334,000	$ 22,334,000	22,334,000	22,334,000
Change in fair value of RML earn-out liability						4,094,000	0	$ 0
Alaska Pacific Bank
Acquired Finite-Lived Intangible Assets [Line Items]
Core deposits as a percent of total			0.50%
Business Acquisition [Line Items]
Voting interests acquired			100.00%
Acquisition cost			$ 13,900,000
Number of shares issued (in shares) | shares			290,212
Cash payment made			$ 6,423,000
Bargain purchase gain			$ 170,000
Purchased impaired loans | purchased_loan			18
Accretable difference on purchased loans			$ 0
Pro forma, interest income						8,700,000	2,095,000
Noninterest expense						5,200,000
Net income (loss) attributable to parent since acquisition						3,500,000
Alaska Pacific Bank | Professional and Outside Services
Business Acquisition [Line Items]
Merger and acquisition expense							1,500,000
Alaska Pacific Bank | Weighted Average
Business Acquisition [Line Items]
Shares issued (USD per share) | $ / shares			$ 25.66
Alaska Pacific Bank | Core Deposits
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets acquired			$ 623,000
RML
Business Acquisition [Line Items]
Voting interests acquired	76.50%
Acquisition cost	$ 29,500,000
Cash payment made	18,240,000
Pro forma, interest income				30,200,000			22,227,000
Noninterest expense				21,500,000
Net income (loss) attributable to parent since acquisition				8,700,000
Merger and acquisition expense						507,000
Fair value of equity interest in acquiree		$ 9,000,000
Gain on purchase of mortgage affiliate					3,000,000
Ownership prior to acquisition of company		23.50%
Goodwill	14,810,000
Liability for future earn out payments	$ 7,318,000			$ 7,300,000	$ 6,600,000	6,600,000	$ 7,300,000
Contingent consideration term	5 years
Change in fair value of RML earn-out liability						4,100,000
Loss Contingency Accrual, Payments						$ 4,900,000
Equity interest percentage	100.00%
RML | Tier One Earn Out
Business Acquisition [Line Items]
Percent of revenue used to calculate liability						40.00%
RML | Tier Two Earn Out
Business Acquisition [Line Items]
Percent of revenue used to calculate liability						50.00%
RML | Tier Three Earn Out
Business Acquisition [Line Items]
Percent of revenue used to calculate liability						70.00%
RML | Tier Four Earn Out
Business Acquisition [Line Items]
Percent of revenue used to calculate liability						85.00%
RML | Tier Five Earn Out
Business Acquisition [Line Items]
Percent of revenue used to calculate liability						55.00%
RML | Trade Names
Business Acquisition [Line Items]
Indefinite-lived intangible assets acquired	$ 950,000
RML | Minimum | Tier One Earn Out
Business Acquisition [Line Items]
Revenue range used to calculate liability						$ 1,000,000
RML | Minimum | Tier Two Earn Out
Business Acquisition [Line Items]
Revenue range used to calculate liability						2,000,000
RML | Minimum | Tier Three Earn Out
Business Acquisition [Line Items]
Revenue range used to calculate liability						3,000,000
RML | Minimum | Tier Four Earn Out
Business Acquisition [Line Items]
Revenue range used to calculate liability						4,000,000
RML | Minimum | Tier Five Earn Out
Business Acquisition [Line Items]
Revenue range used to calculate liability						6,000,000
RML | Maximum | Tier One Earn Out
Business Acquisition [Line Items]
Revenue range used to calculate liability						2,000,000
RML | Maximum | Tier Two Earn Out
Business Acquisition [Line Items]
Revenue range used to calculate liability						3,000,000
RML | Maximum | Tier Three Earn Out
Business Acquisition [Line Items]
Revenue range used to calculate liability						4,000,000
RML | Maximum | Tier Four Earn Out
Business Acquisition [Line Items]
Revenue range used to calculate liability						$ 6,000,000