GOODWILL AND OTHER INTANGIBLE ASSETS (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Goodwill impairment charge	$ 34,013	$ 0	$ 34,013	$ 31,992
Goodwill	470,633		470,633		$ 453,105
Property, plant and equipment, net	1,648,571		1,648,571		1,532,467
Intangible assets	507,337		507,337		506,818
Amortization of permits and other intangible assets	10,800	$ 9,900	30,300	$ 29,700
Lodging Services
Segment Reporting Information [Line Items]
Goodwill	34,000		34,000
Fair value of goodwill	0		0
Goodwill impairment charge	34,000
Goodwill	0		0		32,208
Property, plant and equipment, net	99,764		99,764		105,208
Intangible assets	5,951		5,951		7,045
Industrial and Field Services
Segment Reporting Information [Line Items]
Goodwill	106,349		106,349		105,286
Property, plant and equipment, net	211,712		211,712		237,660
Intangible assets	11,490		11,490		$ 14,649
Industrial and Field Services | Industrial Services
Segment Reporting Information [Line Items]
Goodwill	$ 25,100		$ 25,100