LEASES (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Operating Leases [Abstract]
Operating lease cost	$ 3,800	$ 3,700	$ 7,600	$ 7,400
Operating cash flow information [Abstract]
Cash paid for amounts included in the measurement of operating lease liabilities	3,829	3,802	7,037	7,643
Non-cash activity [Abstract]
Lease liabilities arising from obtaining right-of-use assets	$ 3,152	$ 8,731	$ 3,202	$ 8,781
Weighted Average Remaining Lease Term and Discount Rate [Abstract]
Weighted-average remaining lease term	5 years 8 months 15 days	6 years 4 months 20 days	5 years 8 months 15 days	6 years 4 months 20 days
Weighted-average discount rate	10.93%	11.94%	10.93%	11.94%
Maturities of Lease Liabilities [Abstract]
2021 (excluding the six months ended June 30, 2021)	$ 7,909		$ 7,909
2022	15,668		15,668
2023	14,531		14,531
2024	12,952		12,952
2025	11,205		11,205
2026	8,122		8,122
Thereafter	10,560		10,560
Total lease payments	80,947		80,947
Less: imputed interest	(20,308)		(20,308)
Present value of lease liabilities	$ 60,639		$ 60,639
Minimum [Member]
Operating Leases [Abstract]
Remaining lease term	1 year		1 year
Maximum [Member]
Operating Leases [Abstract]
Remaining lease term	11 years		11 years
Variable lease cost	$ 100		$ 100

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Amount of lessee's undiscounted obligation for lease payment for operating lease due after fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of lessee's undiscounted obligation for lease payment for operating lease having initial or remaining lease term in excess of one year to be paid in remainder of current fiscal year.

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Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for operating lease.

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Remaining lease term of operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of single lease cost, calculated by allocation of remaining cost of lease over remaining lease term. Includes, but is not limited to, single lease cost, after impairment of right-of-use asset, calculated by amortization of remaining right-of-use asset and accretion of lease liability.

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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases.

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