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Commercial Loans - Summary of Activity in Allowance for Commercial Loan Losses (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Financing Receivable, Allowance for Credit Losses [Roll Forward]    
Provision for loan losses $ (289) $ (206)
Commercial Loans    
Financing Receivable, Allowance for Credit Losses [Roll Forward]    
Balance at beginning of period 7,102 7,457
Provision for loan losses (288) (205)
Balance at End of Period $ 7,390 $ 7,662