SEGMENT REPORTING (Tables)

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Reconciliation of third party revenues to direct revenues

The following table reconciles third party revenues to direct revenues for the three and six months ended June 30, 2018 and 2017 (in thousands):

	For the Three Months Ended June 30, 2018											For the Three Months Ended June 30, 2017
	Third party revenues		Intersegment revenues, net			Corporate Items, net			Direct revenues			Third party revenues		Intersegment revenues, net			Corporate Items, net			Direct revenues
Environmental Services	$	519,916	$	34,291		$	607		$	554,814		$	449,631	$	31,639		$	320		$	481,590
Safety-Kleen	328,715		(34,291		)	11			294,435			302,956		(31,639		)	(2		)	271,315
Corporate Items	509		—			(618		)	(109		)	201		—			(318		)	(117		)
Total	$	849,140	$	—		$	—		$	849,140		$	752,788	$	—		$	—		$	752,788

	For the Six Months Ended June 30, 2018											For the Six Months Ended June 30, 2017
	Third party revenues		Intersegment revenues, net			Corporate Items, net			Direct revenues			Third party revenues		Intersegment revenues, net			Corporate Items, net			Direct revenues
Environmental Services	$	959,604	$	66,256		$	1,401		$	1,027,261		$	845,538	$	63,708		$	1,240		$	910,486
Safety-Kleen	638,633		(66,256		)	22			572,399			595,857		(63,708		)	1			532,150
Corporate Items	681		—			(1,423		)	(742		)	334		—			(1,241		)	(907		)
Total	$	1,598,918	$	—		$	—		$	1,598,918		$	1,441,729	$	—		$	—		$	1,441,729

Reconciliation to consolidated statements of income from adjusted EBITDA

The following table presents Adjusted EBITDA information used by management by reported segment (in thousands):

	For the Three Months Ended						For the Six Months Ended
	June 30,						June 30,
	2018			2017			2018			2017
Adjusted EBITDA:
Environmental Services	$	109,199		$	94,832		$	170,616		$	155,022
Safety-Kleen	73,069			60,281			134,953			112,649
Corporate Items	(42,707		)	(34,422		)	(77,743		)	(66,845		)
Total	$	139,561		$	120,691		$	227,826		$	200,826
Reconciliation to Consolidated Statements of Operations:
Accretion of environmental liabilities	2,448			2,416			4,878			4,706
Depreciation and amortization	72,760			71,531			147,604			143,943
Income from operations	64,353			46,744			75,344			52,177
Other (income) expense, net	(846		)	833			(547		)	2,382
Loss on early extinguishment of debt	—			6,045			—			6,045
Gain on sale of business	—			(31,722		)	—			(31,722		)
Interest expense, net of interest income	20,769			22,492			41,039			45,068
Income before provision for income taxes	$	44,430		$	49,096		$	34,852		$	30,404

PP&E, intangible assets and total assets by segment

The following table presents certain assets by reportable segment and in the aggregate (in thousands):

	June 30, 2018
	Environmental Services		Safety-Kleen		Corporate Items		Totals
Property, plant and equipment, net	$	988,957	$	555,124	$	65,301	$	1,609,382
Goodwill	192,629		304,622		—		497,251
Permits and other intangibles, net	96,165		359,755		—		455,920
Total assets	$	1,681,627	$	1,436,014	$	597,820	$	3,715,461

	December 31, 2017
	Environmental Services		Safety-Kleen		Corporate Items		Totals
Property, plant and equipment, net	$	927,139	$	582,162	$	78,064	$	1,587,365
Goodwill	172,386		306,137		—		478,523
Permits and other intangibles, net	97,519		371,609		—		469,128
Total assets	$	1,541,241	$	1,471,291	$	694,038	$	3,706,570

Total assets by geographical area

The following table presents total assets by geographical area (in thousands):

	June 30, 2018		December 31, 2017
United States	$	3,041,509	$	2,985,394
Canada	673,836		721,176
Other foreign	116		—
Total	$	3,715,461	$	3,706,570