Loans - Narrative (Details)		6 Months Ended		12 Months Ended
	Apr. 01, 2014 purchased_loan	Jun. 30, 2015 USD ($) financing_commitment Contract	Jun. 30, 2014 Contract	Dec. 31, 2014 USD ($) Contract	Apr. 02, 2014 USD ($)
Business Acquisition [Line Items]
Nonaccrual loans		$ 5,040,000		$ 4,674,000
Nonperforming loans minimum threshold for individual impairment evaluation		50,000
Recorded investment in loans considered to be impaired		26,345,000		11,297,000
Fair value of purchased credit impaired loans		2,600,000			$ 3,900,000
Loans classified as troubled debt restructuring		$ 8,955,000		$ 7,700,000
Number of commitments on TDR | financing_commitment		0
TDR Write-downs		$ 0
TDR with specific allowance, Number of Contracts | Contract		2		0
Post-Modification Recorded Investment		$ 1,400,000
Financing Receivable, Modifications, Specific Contract, Allowance for Credit Losses		$ 111,000
TDR that Subsequently Defaulted, Number of Contracts | Contract		0	1
Alaska Pacific Bank
Business Acquisition [Line Items]
Purchased impaired loans | purchased_loan	18
Accretable difference on purchased loans		$ 0
Fair value of purchased credit impaired loans					$ 3,899,000