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LEASES - Summary of ROU Assets and Related Lease Liabilities (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Jan. 01, 2019
Leases [Abstract]      
Cash paid for operating lease liabilities $ 180    
Right-of-use asset obtained in exchange for operating lease liabilities $ 8,115 $ 0  
Weighted average remaining lease term (in years) 21 years 3 months 18 days    
Weighted average discount rate percent 4.70%    
Right-of-use asset $ 144    
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Operating lease liability $ 8,029    
ASU 2016-02      
Leases [Abstract]      
Right-of-use asset     $ 7,494
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Operating lease liability     $ 7,971