Annual report pursuant to Section 13 and 15(d)

LEASES - Components of Lease Expense (Details)

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LEASES - Components of Lease Expense (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Lessee, Lease, Description [Line Items]      
Total operating lease cost $ 4,225,000 $ 4,498,000 $ 0
Finance lease cost, amortization of right-of-use assets 0 0 0
Finance lease cost, interest on lease liabilities 0 0 0
Total finance lease cost 0 0 0
Total lease cost 4,225,000 4,498,000 0
Short-term lease costs 500,000 100,000 0
Variable lease costs 0    
Cost of sales, exclusive of depreciation and amortization      
Lessee, Lease, Description [Line Items]      
Total operating lease cost 4,088,000 4,361,000 0
Selling, general and administrative      
Lessee, Lease, Description [Line Items]      
Total operating lease cost $ 137,000 $ 137,000 $ 0