GOODWILL AND OTHER INTANGIBLE ASSETS (Narrative) (Details) - USD ($)	3 Months Ended			12 Months Ended
	Sep. 30, 2016	Jun. 30, 2015	Sep. 30, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Indefinite-lived Intangible Assets [Line Items]
Accumulated goodwill impairment charges				$ 189,400,000
Goodwill impairment charge	$ 34,000,000	$ 32,000,000		34,013,000	$ 31,992,000	$ 123,414,000
Goodwill remaining				465,154,000	453,105,000	452,669,000
Property, plant and equipment, net				1,611,827,000	1,532,467,000
Intangible assets				498,721,000	506,818,000
Amortization expense of permits and other intangible assets				40,000,000	40,200,000	36,700,000
Oil, Gas and Lodging Services
Indefinite-lived Intangible Assets [Line Items]
Goodwill impairment charge				34,013,000	31,992,000
Goodwill remaining				0	32,208,000	68,607,000
Property, plant and equipment, net				182,038,000	215,645,000
Intangible assets				10,889,000	19,358,000
Oil, Gas and Lodging Services | Lodging Segment
Indefinite-lived Intangible Assets [Line Items]
Goodwill impairment charge	34,000,000
Goodwill	34,000,000
Fair value of goodwill	$ 0
Property, plant and equipment, net				93,800,000
Intangible assets				5,400,000
Oil, Gas and Lodging Services | Oil and Gas Field Services
Indefinite-lived Intangible Assets [Line Items]
Goodwill impairment charge		32,000,000
Fair value of goodwill		0
Goodwill remaining		$ 32,000,000
Property, plant and equipment, net				88,200,000
Intangible assets				5,500,000
Safety-Kleen
Indefinite-lived Intangible Assets [Line Items]
Goodwill impairment charge			$ 123,400,000	0	0
Goodwill remaining				296,070,000	266,344,000	$ 224,756,000
Property, plant and equipment, net				584,647,000	458,394,000
Intangible assets				$ 391,390,000	$ 396,661,000