GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Changes to Goodwill

The changes in goodwill for the years ended December 31, 2015 and 2014 were as follows (in thousands):

	Technical Services			Industrial and Field Services			Kleen Performance Products			SK Environmental Services			Lodging Services			Oil and Gas Field Services			Totals
Balance at January 1, 2014	$	45,599		$	109,873		$	171,161		$	172,309		$	35,512		$	36,506		$	570,960
Acquired from acquisitions	5,018			—			—			—			2,383			—			7,401
Measurement period adjustments	—			—			4,288			—			—			—			4,288
Goodwill impairment charge	—			—			(123,414		)	—			—			—			(123,414		)
Foreign currency translation and other	(525		)	(659		)	(1,152		)	1,564			(3,032		)	(2,762		)	(6,566		)
Balance at December 31, 2014	$	50,092		$	109,214		$	50,883		$	173,873		$	34,863		$	33,744		$	452,669
Acquired from acquisitions	—			—			—			46,539			—			—			46,539
Measurement period adjustments	—			—			—			—			3,574			—			3,574
Goodwill impairment charge	—			—			—			—			—			(31,992		)	(31,992		)
Foreign currency translation and other	(825		)	(3,928		)	(1,128		)	(3,823		)	(6,229		)	(1,752		)	(17,685		)
Balance at December 31, 2015	$	49,267		$	105,286		$	49,755		$	216,589		$	32,208		$	—		$	453,105

Schedule of Finite-Lived Intangible Assets by Major Class

As of December 31, 2015 and 2014, the Company's finite-lived and indefinite lived intangible assets consisted of the following (in thousands):

	December 31, 2015							December 31, 2014
	Cost		Accumulated Amortization		Net		Weighted Average Amortization Period (in years)	Cost		Accumulated Amortization		Net		Weighted Average Amortization Period (in years)
Permits	$	161,396	$	61,142	$	100,254	19.0	$	156,692	$	55,318	$	101,374	19.0
Customer and supplier relationships	374,866		99,463		275,403		10.1	370,373		77,697		292,676		11.0
Other intangible    assets	31,416		22,581		8,835		1.5	31,540		19,074		12,466		3.2
Total amortizable permits and other intangible assets	567,678		183,186		384,492		10.0	558,605		152,089		406,516		11.4
Trademarks and trade     names	122,326		—		122,326		Indefinite	123,564		—		123,564		Indefinite
Total permits and other intangible assets	$	690,004	$	183,186	$	506,818		$	682,169	$	152,089	$	530,080

Schedule of Indefinite-Lived Intangible Assets

As of December 31, 2015 and 2014, the Company's finite-lived and indefinite lived intangible assets consisted of the following (in thousands):

	December 31, 2015							December 31, 2014
	Cost		Accumulated Amortization		Net		Weighted Average Amortization Period (in years)	Cost		Accumulated Amortization		Net		Weighted Average Amortization Period (in years)
Permits	$	161,396	$	61,142	$	100,254	19.0	$	156,692	$	55,318	$	101,374	19.0
Customer and supplier relationships	374,866		99,463		275,403		10.1	370,373		77,697		292,676		11.0
Other intangible    assets	31,416		22,581		8,835		1.5	31,540		19,074		12,466		3.2
Total amortizable permits and other intangible assets	567,678		183,186		384,492		10.0	558,605		152,089		406,516		11.4
Trademarks and trade     names	122,326		—		122,326		Indefinite	123,564		—		123,564		Indefinite
Total permits and other intangible assets	$	690,004	$	183,186	$	506,818		$	682,169	$	152,089	$	530,080

Schedule of Expected Amortization for the Net Carrying Amount of Finite Lived Intangible Assets

The expected amortization of the net carrying amount of finite-lived intangible assets at December 31, 2015 is as follows(in thousands):

Years Ending December 31,	Expected Amortization
2016	$	37,902
2017	33,081
2018	30,450
2019	27,926
2020	25,539
Thereafter	229,594
	$	384,492