GOODWILL AND OTHER INTANGIBLE ASSETS (Narrative) (Details) - USD ($)	3 Months Ended		12 Months Ended
	Sep. 30, 2016	Jun. 30, 2015	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Indefinite-lived Intangible Assets [Line Items]
Accumulated goodwill impairment charges			$ 189,400,000
Goodwill impairment charge	$ 34,000,000		0	$ 34,013,000	$ 31,992,000
Property, plant and equipment, net			1,587,365,000	1,611,827,000
Intangible assets			469,128,000	498,721,000
Amortization expense of permits and other intangible assets			37,000,000	40,000,000	40,200,000
Lodging Segment
Indefinite-lived Intangible Assets [Line Items]
Goodwill impairment charge				34,000,000
Oil and Gas Field Services
Indefinite-lived Intangible Assets [Line Items]
Goodwill impairment charge					$ 32,000,000
Oil, Gas and Lodging Services
Indefinite-lived Intangible Assets [Line Items]
Goodwill impairment charge				34,013,000
Property, plant and equipment, net			168,294,000	182,038,000
Intangible assets			6,695,000	10,889,000
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			95,600,000
Intangible assets			3,900,000
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
Property, plant and equipment, net			72,700,000
Intangible assets			2,800,000
Safety-Kleen
Indefinite-lived Intangible Assets [Line Items]
Goodwill impairment charge				0
Property, plant and equipment, net			582,162,000	584,647,000
Intangible assets			$ 371,609,000	$ 391,390,000