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FAIR VALUE, Assets and Liabilities Measured on Nonrecurring Basis (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair value of MSRs at end of period $ 2,473 $ 1,928  
Valuation allowance 804 477  
Carrying value before valuation allowance at end of period 1,358 1,435 $ 1,472
Mortgage Servicing Rights [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Fair value of MSRs at end of period 2,500    
Valuation allowance 0    
Carrying value before valuation allowance at end of period 1,400    
Other Real Estate Owned [Member] | Market Approach Valuation Technique [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Total $ 1,915 $ 1,966  
Other Real Estate Owned [Member] | Market Approach Valuation Technique [Member] | Minimum [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Discount rate 9.00% 9.00%  
Other Real Estate Owned [Member] | Market Approach Valuation Technique [Member] | Maximum [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Discount rate 99.00% 97.00%  
Level 3 [Member] | Other Real Estate Owned [Member] | Market Approach Valuation Technique [Member] | Minimum [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Discount rate 9.00%    
Level 3 [Member] | Other Real Estate Owned [Member] | Market Approach Valuation Technique [Member] | Maximum [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Discount rate 99.00%    
Non-recurring [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Impaired loans $ 0 $ 633  
Other real estate owned 1,915 1,966  
Total 1,915 2,599  
Non-recurring [Member] | Level 1 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Impaired loans 0 0  
Other real estate owned 0 0  
Total 0 0  
Non-recurring [Member] | Level 2 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Impaired loans 0 0  
Other real estate owned 0 0  
Total 0 0  
Non-recurring [Member] | Level 3 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Impaired loans 0 633  
Other real estate owned 1,915 1,966  
Total $ 1,915 $ 2,599