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LEASES - Additional Information (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Jan. 01, 2019
Lessee Lease Description [Line Items]    
Operating lease right-of-use assets $ 12,132,000 $ 7,900,000
Operating lease liabilities $ 12,423,000 $ 8,200,000
Weighted average discount rate 3.05%  
Weighted average lease term 6 years 3 months 29 days  
Operating lease costs $ 2,800,000  
Variable lease costs $ 329,000  
Minimum [Member]    
Lessee Lease Description [Line Items]    
Remaining lease term 5 months  
Maximum [Member]    
Lessee Lease Description [Line Items]    
Remaining lease term 17 years