GOODWILL AND INTANGIBLE ASSETS, NET - Intangible Assets, Net (Details 2) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Intangible Assets, Net
Impairment of intangible assets	$ 0	$ 11,923,000	$ 0
Gross carrying amount	333,787,000	327,782,000
Accumulated amortization	(178,355,000)	(130,779,000)
Net book value	155,432,000	197,003,000
Amortization expense for definite lived intangible assets	47,576,000	41,135,000	$ 37,680,000
2017	35,000,000
2018	26,500,000
2019	21,100,000
2020	17,200,000
2021	12,700,000
Trademarks and trade names
Intangible Assets, Net
Gross carrying amount	15,354,000	15,244,000
Accumulated amortization	(7,724,000)	(6,491,000)
Net book value	$ 7,630,000	8,753,000
Trademarks and trade names | Weighted average
Intangible Assets, Net
Estimated useful lives	13 years
Customer related intangible assets
Intangible Assets, Net
Gross carrying amount	$ 277,828,000	274,428,000
Accumulated amortization	(156,980,000)	(113,725,000)
Net book value	$ 120,848,000	160,703,000
Customer related intangible assets | Weighted average
Intangible Assets, Net
Estimated useful lives	10 years
Operating agreement
Intangible Assets, Net
Gross carrying amount	$ 35,000,000	35,000,000
Accumulated amortization	(12,104,000)	(10,354,000)
Net book value	$ 22,896,000	24,646,000
Operating agreement | Weighted average
Intangible Assets, Net
Estimated useful lives	20 years
Non-compete agreements
Intangible Assets, Net
Gross carrying amount	$ 1,560,000	1,435,000
Accumulated amortization	(507,000)	(115,000)
Net book value	$ 1,053,000	1,320,000
Non-compete agreements | Weighted average
Intangible Assets, Net
Estimated useful lives	4 years
Intellectual property
Intangible Assets, Net
Gross carrying amount	$ 300,000	300,000
Accumulated amortization	(85,000)	(55,000)
Net book value	$ 215,000	245,000
Intellectual property | Weighted average
Intangible Assets, Net
Estimated useful lives	10 years
Other intangible assets
Intangible Assets, Net
Gross carrying amount	$ 3,745,000	1,375,000
Accumulated amortization	(955,000)	(39,000)
Net book value	$ 2,790,000	$ 1,336,000
Other intangible assets | Weighted average
Intangible Assets, Net
Estimated useful lives	5 years