Quarterly report pursuant to Section 13 or 15(d)

BORROWINGS (Advances from the FHLB) (Details)

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BORROWINGS (Advances from the FHLB) (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2018
Dec. 31, 2017
Federal Home Loan Bank, Advances [Line Items]    
Advance Amount $ 215,000 $ 200,000
Adjustable Rate Credit One    
Federal Home Loan Bank, Advances [Line Items]    
Interest Rate 2.84% 2.13%
Maturity Date Aug. 23, 2022 Aug. 23, 2022
Advance Amount $ 55,000 $ 55,000
Adjustable Rate Credit One | LIBOR    
Federal Home Loan Bank, Advances [Line Items]    
Spread to 3-Month LIBOR 0.44% 0.44%
Adjustable Rate Credit Two    
Federal Home Loan Bank, Advances [Line Items]    
Interest Rate 2.85% 2.15%
Maturity Date Nov. 23, 2022 Nov. 23, 2022
Advance Amount $ 65,000 $ 65,000
Adjustable Rate Credit Two | LIBOR    
Federal Home Loan Bank, Advances [Line Items]    
Spread to 3-Month LIBOR 0.45% 0.45%
Adjustable Rate Credit Three    
Federal Home Loan Bank, Advances [Line Items]    
Interest Rate 2.85% 2.15%
Maturity Date Nov. 23, 2022 Nov. 23, 2022
Advance Amount $ 10,000 $ 10,000
Adjustable Rate Credit Three | LIBOR    
Federal Home Loan Bank, Advances [Line Items]    
Spread to 3-Month LIBOR 0.45% 0.45%
Adjustable Rate Credit Four    
Federal Home Loan Bank, Advances [Line Items]    
Interest Rate 2.85% 2.15%
Maturity Date Nov. 23, 2022 Nov. 23, 2022
Advance Amount $ 10,000 $ 10,000
Adjustable Rate Credit Four | LIBOR    
Federal Home Loan Bank, Advances [Line Items]    
Spread to 3-Month LIBOR 0.45% 0.45%
Fixed Rate One    
Federal Home Loan Bank, Advances [Line Items]    
Interest Rate   3.75%
Maturity Date   Jul. 30, 2018
Advance Amount   $ 5,000
Fixed Rate Two    
Federal Home Loan Bank, Advances [Line Items]    
Interest Rate   3.97%
Maturity Date   Jul. 30, 2018
Advance Amount   $ 5,000
Fixed Rate Hybrid One    
Federal Home Loan Bank, Advances [Line Items]    
Interest Rate 0.99% 0.99%
Maturity Date Oct. 19, 2018 Oct. 19, 2018
Advance Amount $ 30,000 $ 30,000
Fixed Rate Hybrid Two    
Federal Home Loan Bank, Advances [Line Items]    
Interest Rate 2.37% 1.58%
Maturity Date Oct. 10, 2019 May 18, 2020
Advance Amount $ 25,000 $ 20,000
Fixed Rate Hybrid Three    
Federal Home Loan Bank, Advances [Line Items]    
Interest Rate 1.58%  
Maturity Date May 18, 2020  
Advance Amount $ 20,000