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Business Combinations - Schedule of Loans Acquired with Deteriorating Credit Quality (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Apr. 02, 2014
Business Acquisition [Line Items]    
Fair value of purchased credit impaired loans $ 3,600 $ 3,900
Alaska Pacific Bank
   
Business Acquisition [Line Items]    
Contractually required principal payments   7,553
Nonaccretable difference   (3,654)
Fair value of purchased credit impaired loans   $ 3,899