GOODWILL AND OTHER INTANGIBLE ASSETS

3 Months Ended

Mar. 31, 2017

Goodwill and Intangible Assets Disclosure [Abstract]

The changes in goodwill for the three months ended March 31, 2017 were as follows (in thousands):



	Technical Services		Industrial & Field Services		Safety-Kleen			Oil, Gas and Lodging Services		Totals
Balance at January 1, 2017	$	61,116	$	107,968	$	296,070		$	—	$	465,154
Increase from current period acquisitions	—		—		4,938			—		4,938
Measurement period adjustments from prior period acquisitions	—		—		(731		)	—		(731		)
Foreign currency translation and other	42		163		294			—		499
Balance at March 31, 2017	$	61,158	$	108,131	$	300,571		$	—	$	469,860

The Company assesses goodwill for impairment on an annual basis as of December 31, or at an interim date when events or changes in the business environment would more likely than not reduce the fair value of a reporting unit below its carrying value. The Company conducted the annual impairment test of goodwill for all reporting units as of December 31, 2016 and determined that no adjustment to the carrying value of goodwill for any reporting units was necessary because the fair value of each of the reporting units exceeded that reporting unit's respective carrying value.

As of March 31, 2017 and December 31, 2016, the Company's total finite-lived and indefinite-lived intangible assets consisted of the following (in thousands):



	March 31, 2017							December 31, 2016
	Cost		Accumulated Amortization		Net		Weighted Average Remaining Amortization Period (in years)	Cost		Accumulated Amortization		Net		Weighted Average Remaining Amortization Period (in years)
Permits	$	172,666	$	69,151	$	103,515	19.8	$	171,637	$	67,301	$	104,336	18.9
Customer and supplier relationships	394,086		134,599		259,487		11.9	393,426		127,462		265,964		12.2
Other intangible assets	34,463		29,228		5,235		7.1	34,254		28,456		5,798		7.1
Total amortizable permits and other intangible assets	601,215		232,978		368,237		14.9	599,317		223,219		376,098		13.9
Trademarks and trade names	122,715		—		122,715		Indefinite	122,623		—		122,623		Indefinite
Total permits and other intangible assets	$	723,930	$	232,978	$	490,952		$	721,940	$	223,219	$	498,721

Amortization expense of permits and other intangible assets was $9.1 million and $9.6 million for the three months ended March 31, 2017 and March 31, 2016, respectively.

The expected amortization of the net carrying amount of finite-lived intangible assets at March 31, 2017 was as follows (in thousands):



Years Ending December 31,	Expected Amortization
2017 (nine months)	$	27,392
2018	34,072
2019	31,275
2020	29,067
2021	26,640
Thereafter	219,791
	$	368,237

- Definition

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

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