GOODWILL AND OTHER INTANGIBLE ASSETS (Tables)

6 Months Ended

Jun. 30, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

The changes in goodwill for the six months ended June 30, 2016 were as follows (in thousands):



	Technical Services			Industrial & Field Services		Kleen Performance Products		SK Environmental Services		Lodging Services		Oil and Gas Field Services		Totals
Balance at January 1, 2016	$	49,267		$	105,286	$	49,755	$	216,589	$	32,208	$	—	$	453,105
Acquired from acquisitions	—			—		1,197		—		—		—		1,197
Measurement period adjustment from prior acquisitions	—			—		—		2,095		—		—		2,095
Foreign currency translation and other	(579		)	1,319		157		2,140		2,057		—		5,094
Balance at June 30, 2016	$	48,688		$	106,605	$	51,109	$	220,824	$	34,265	$	—	$	461,491

Summary of amortizable other intangible assets

As of June 30, 2016 and December 31, 2015, the Company's finite-lived and indefinite-lived intangible assets consisted of the following (in thousands):



	June 30, 2016							December 31, 2015
	Cost		Accumulated Amortization		Net		Weighted Average Remaining Amortization Period (in years)	Cost		Accumulated Amortization		Net		Weighted Average Remaining Amortization Period (in years)
Permits	$	162,611	$	64,533	$	98,078	20.7	$	161,396	$	61,142	$	100,254	19.0
Customer and supplier relationships	379,236		115,500		263,736		9.5	374,866		99,463		275,403		10.1
Other intangible assets	33,984		26,517		7,467		1.2	31,416		22,581		8,835		1.5
Total amortizable permits and other intangible assets	575,831		206,550		369,281		9.3	567,678		183,186		384,492		10.0
Trademarks and trade names	122,943		—		122,943		Indefinite	122,326		—		122,326		Indefinite
Total permits and other intangible assets	$	698,774	$	206,550	$	492,224		$	690,004	$	183,186	$	506,818

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 June 30, 2016 was as follows (in thousands):



Years Ending December 31,	Expected Amortization
2016 (six months)	$	19,941
2017	35,033
2018	31,795
2019	28,897
2020	26,277
Thereafter	227,338
	$	369,281