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Fair Value (Measured on a Non-Recurring Basis) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Impaired loans    
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis    
Assets measured on a non-recurring basis, fair value $ 13,365 $ 17,763
Impaired loans | Fair Value Measurements - Level 1 Inputs    
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis    
Assets measured on a non-recurring basis, fair value 0 0
Impaired loans | Fair Value Measurements - Level 2 Inputs    
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis    
Assets measured on a non-recurring basis, fair value 12,268 11,518
Impaired loans | Fair Value Measurements - Level 3 Inputs    
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis    
Assets measured on a non-recurring basis, fair value 1,097 6,245
Foreclosed properties    
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis    
Assets measured on a non-recurring basis, fair value 1,473 1,677
Foreclosed properties | Fair Value Measurements - Level 1 Inputs    
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis    
Assets measured on a non-recurring basis, fair value 0 0
Foreclosed properties | Fair Value Measurements - Level 2 Inputs    
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis    
Assets measured on a non-recurring basis, fair value 1,473 1,677
Foreclosed properties | Fair Value Measurements - Level 3 Inputs    
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis    
Assets measured on a non-recurring basis, fair value 0 0
Loan servicing rights    
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis    
Assets measured on a non-recurring basis, fair value 1,906 1,563
Loan servicing rights | Fair Value Measurements - Level 1 Inputs    
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis    
Assets measured on a non-recurring basis, fair value 0 0
Loan servicing rights | Fair Value Measurements - Level 2 Inputs    
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis    
Assets measured on a non-recurring basis, fair value 0 0
Loan servicing rights | Fair Value Measurements - Level 3 Inputs    
Fair Value, Assets and Liabilities Measured on a Nonrecurring Basis    
Assets measured on a non-recurring basis, fair value $ 1,906 $ 1,563