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Disclosures about Fair Value of Assets and Liabilities - Assets and Liabilities Measured at Fair Value on Nonrecurring Basis (Details) - Nonrecurring
$ in Thousands
Dec. 31, 2016
USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Impaired loans (collateral dependent) $ 225
Level 3  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]  
Impaired loans (collateral dependent) $ 225