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Fair Value of Assets and Liabilities - Recorded on Nonrecurring Basis (Details) - USD ($)
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Discount rate for selling costs applied to all properties 6.00%    
Changed in estimated value of OREO   $ 0  
Financial instruments at fair value measured on a nonrecurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Other real estate owned $ 0   $ 0
Financial instruments at fair value measured on a nonrecurring basis | Significant Other Observable Inputs (Level 2)      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Other real estate owned 0   0
Financial instruments at fair value measured on a nonrecurring basis | Significant Unobservable Inputs (Level 3)      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Other real estate owned 238,000   408,000
Financial instruments at fair value measured on a nonrecurring basis | Carrying Value      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Other real estate owned $ 238,000   $ 408,000