GOODWILL AND INTANGIBLE ASSETS, NET - Intangible Assets, Net (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Intangible Assets, Net
Gross carrying amount	$ 259,016	$ 259,016
Accumulated amortization	(232,468)	(227,286)
Net book value	26,548	31,730
Customer related intangible assets
Intangible Assets, Net
Gross carrying amount	214,307	214,307
Accumulated amortization	(200,656)	(197,594)
Net book value	$ 13,651	16,713
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	(24,354)	(22,604)
Net book value	$ 10,646	12,396
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	(7,458)	(7,088)
Net book value	$ 2,251	$ 2,621
Trademarks and trade names | Weighted average
Intangible Assets, Net
Weighted average estimated useful life (in years)	16 years