LEASES - Components of Lease Expense and Payments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
LEASES
Operating lease cost	$ 6,142	$ 4,225
Short-term lease cost	509	408
Variable lease cost	804	1,065
Total operating lease cost	7,455	5,698
Payments for lease liabilities	5,600	3,500
Lease liabilities arising from ROU	3,700	2,200
Finance lease cost:
Amortization of right-of-use asset	797	574
Variable costs	248	196
Interest costs	102
Total finance lease cost	1,147	770
Finance leases cost included in property, plant and equipment	28,100	26,500	$ 30,800
Accumulated amortization related to finance leases	11,100	10,100	12,100
Principal payments, finance lease liabilities	338
Operating cash flows for finance lease liabilities	100
Additional finance lease liabilities recognized	800	1,100
Finance lease, disposed	1,000
Finance lease liability	6,507	2,200	$ 6,052
Finance lease liability, current	$ 1,100	$ 400