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Bank Owned Life Insurance (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Insurance [Abstract]      
Estimated death benefits $ 71,000    
Death benefits provided under terms of the programs 32,400 $ 29,500  
Earnings on bank-owned life Insurance $ 844 $ 814 $ 841