Annual report pursuant to Section 13 and 15(d)

LEASES - Additional Information (Details)

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LEASES - Additional Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Jan. 01, 2019
Lessee, Lease, Description [Line Items]        
Operating lease, right of use asset $ 15,832      
Operating lease liability $ 18,135      
Finance lease renewal term (in years) 40 years      
Finance lease, termination term (in years) 5 years      
Finance lease, weighted-average remaining lease term (in years) 52 years      
Finance lease, weighted-average discount rate (as a percentage) 12.00%      
Finance lease, right-of-use asset $ 13,437      
Finance lease, liability 9,896      
Payments of finance lease principal 2,224      
Finance lease, amortization of right of use liabilities $ 200      
Operating lease renewal term (in years) 10 years      
Operating lease, weighted-average remaining lease term (in years) 6 years      
Operating lease, weighted-average discount rate (as a percentage) 8.00%      
Operating lease costs $ 3,600 $ 3,200 $ 2,300  
Operating lease, cash paid for amounts included in the measurement of lease liabilities 3,200 $ 2,200 $ 1,000  
Accrued and other liabilities        
Lessee, Lease, Description [Line Items]        
Operating lease liability 2,300      
Finance lease, liability 1,400      
Other non-current liabilities        
Lessee, Lease, Description [Line Items]        
Operating lease liability 15,800      
Finance lease, liability 8,500      
Other non-current assets        
Lessee, Lease, Description [Line Items]        
Operating lease, right of use asset $ 15,800      
Accounting Standards Update 2016-02        
Lessee, Lease, Description [Line Items]        
Operating lease, right of use asset       $ 17,900
Operating lease liability       $ 19,800