SEGMENT REPORTING (Tables)

12 Months Ended

Dec. 31, 2019

Segment Reporting [Abstract]

Reconciliation of Third Party Revenues to Direct Revenues

The following tables reconcile third-party revenues to direct revenues for the years ended December 31, 2019, 2018 and 2017 (in thousands):

	For the year ended December 31, 2019
	Environmental Services		Safety-Kleen			Corporate Items			Totals
Third-party revenues	$	2,092,363	$	1,318,691		$	1,136		$	3,412,190
Intersegment revenues, net	140,577		(140,577		)	—			—
Corporate Items, net	4,128		15			(4,143		)	—
Direct revenues	$	2,237,068	$	1,178,129		$	(3,007	)	$	3,412,190

	For the year ended December 31, 2018
	Environmental Services		Safety-Kleen			Corporate Items			Totals
Third-party revenues	$	2,003,843	$	1,295,355		$	1,105		$	3,300,303
Intersegment revenues, net	134,104		(134,104		)	—			—
Corporate Items, net	3,247		31			(3,278		)	—
Direct revenues	$	2,141,194	$	1,161,282		$	(2,173	)	$	3,300,303

	For the year ended December 31, 2017
	Environmental Services		Safety-Kleen			Corporate Items			Totals
Third-party revenues	$	1,728,700	$	1,213,703		$	2,575		$	2,944,978
Intersegment revenues, net	125,822		(125,822		)	—			—
Corporate Items, net	2,952		5			(2,957		)	—
Direct revenues	$	1,857,474	$	1,087,886		$	(382	)	$	2,944,978

Reconciliation to Consolidated Statements of Income to Adjusted EBITDA

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

	For the years ended December 31,
	2019			2018			2017
Adjusted EBITDA:
Environmental Services	$	446,284		$	380,856		$	321,310
Safety-Kleen	282,378			282,029			249,811
Corporate Items	(188,345		)	(171,880		)	(145,464		)
Total	540,317			491,005			425,657
Reconciliation to Consolidated Statements of Operations:
Accretion of environmental liabilities	10,136			9,806			9,460
Depreciation and amortization	300,725			298,625			288,422
Income from operations	229,456			182,574			127,775
Other (income) expense, net	(2,897		)	4,510			6,119
Loss on early extinguishment of debt	6,131			2,488			7,891
Gain on sale of businesses	(687		)	—			(30,732		)
Interest expense, net of interest income	78,670			81,094			85,808
Income from operations before provision (benefit) for income taxes	$	148,239		$	94,482		$	58,689

Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas [Table Text Block]

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

	December 31, 2019		December 31, 2018
Property, plant and equipment, net
Environmental Services	$	939,352	$	951,867
Safety-Kleen	555,310		553,220
Corporate Items	93,489		56,891
Total property, plant and equipment, net	$	1,588,151	$	1,561,978
Goodwill and Permits and other intangibles, net
Environmental Services
Goodwill	$	212,531	$	207,019
Permits and other intangibles, net	89,722		93,313
Total Environmental Services	302,253		300,332
Safety-Kleen
Goodwill	$	312,482	$	307,170
Permits and other intangibles, net	329,344		348,562
Total Safety-Kleen	641,826		655,732
Total	$	944,079	$	956,064

Geographic Information

As of December 31, 2019 and 2018, the Company had property, plant and equipment, net of depreciation and amortization and permits and other

PP&E and Intangible Assets by Segment

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

	December 31, 2019		December 31, 2018
Property, plant and equipment, net
Environmental Services	$	939,352	$	951,867
Safety-Kleen	555,310		553,220
Corporate Items	93,489		56,891
Total property, plant and equipment, net	$	1,588,151	$	1,561,978
Goodwill and Permits and other intangibles, net
Environmental Services
Goodwill	$	212,531	$	207,019
Permits and other intangibles, net	89,722		93,313
Total Environmental Services	302,253		300,332
Safety-Kleen
Goodwill	$	312,482	$	307,170
Permits and other intangibles, net	329,344		348,562
Total Safety-Kleen	641,826		655,732
Total	$	944,079	$	956,064

Total Assets by Segment

Total Assets by Geographical Area

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

	December 31, 2019		December 31, 2018
United States	$	3,413,254	$	3,090,311
Canada and other foreign	695,650		648,010
Total	$	4,108,904	$	3,738,321