GOODWILL AND INTANGIBLE ASSETS, NET - Intangible Assets, Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Intangible Assets, Net
Gross carrying amount	$ 259,016	$ 259,016
Accumulated amortization	(227,286)	(222,157)
Net book value	31,730	36,859
Customer related intangible assets
Intangible Assets, Net
Gross carrying amount	214,307	214,307
Accumulated amortization	(197,594)	(194,594)
Net book value	$ 16,713	19,713
Customer related intangible assets | Weighted average
Intangible Assets, Net
Weighted average estimated useful life (in years)	9 years
Operating agreement
Intangible Assets, Net
Gross carrying amount	$ 35,000	35,000
Accumulated amortization	(22,604)	(20,854)
Net book value	$ 12,396	14,146
Operating agreement | Weighted average
Intangible Assets, Net
Weighted average estimated useful life (in years)	20 years
Trademarks and trade names
Intangible Assets, Net
Gross carrying amount	$ 9,709	9,709
Accumulated amortization	(7,088)	(6,709)
Net book value	$ 2,621	$ 3,000
Trademarks and trade names | Weighted average
Intangible Assets, Net
Weighted average estimated useful life (in years)	16 years