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LOANS - Troubled debt restructurings (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2017
USD ($)
Integer
Dec. 31, 2016
USD ($)
Integer
Residential real estate    
Quantity of troubled debt restructurings | Integer 1 5
Pre-modification balance $ 222 $ 772
Post-modification balance $ 222 $ 772
Business Activities Loans - Residential real estate - Land    
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance
Commercial and industrial    
Quantity of troubled debt restructurings | Integer 1 2
Pre-modification balance $ 600 $ 2,123
Post-modification balance $ 600 $ 2,123
Business Activities Loans - Commercial real estate - Construction of commercial    
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance
Business Activities Loans - Commercial real estate - Consumer    
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance
Business Activities Loans - Commercial and industrial    
Quantity of troubled debt restructurings | Integer 2
Pre-modification balance $ 182
Post-modification balance $ 182
Business Activities Loans - HELOC    
Quantity of troubled debt restructurings | Integer
Pre-modification balance
Post-modification balance
Totals    
Quantity of troubled debt restructurings | Integer 4 7
Pre-modification balance $ 1,004 $ 2,895
Post-modification balance $ 1,004 $ 2,895
Business Activities Loans - Rate reduction and term extension    
Quantity of troubled debt restructurings | Integer 3 2
Pre-modification balance $ 404 $ 262
Post-modification balance $ 404 $ 262
Business Activities Loans - Debt consolidation and term extension    
Quantity of troubled debt restructurings | Integer 1
Pre-modification balance $ 260
Post-modification balance $ 260
Business Activities Loans - Debt consolidation    
Quantity of troubled debt restructurings | Integer 1
Pre-modification balance $ 1,863
Post-modification balance $ 1,863
Business Activities Loans - Term extension    
Quantity of troubled debt restructurings | Integer 1 3
Pre-modification balance $ 600 $ 510
Post-modification balance $ 600 $ 510