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Fair Value Measurements - Quantitative Information (Details)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Securities available for sale    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Selling cost   49.00%
Impaired loans    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Selling cost 8.00% 6.00%
Discount rate   4.00%
Other real estate owned    
Fair Value Inputs, Assets, Quantitative Information [Line Items]    
Selling cost 6.00% 6.00%