Segment Reporting (Total Reported Revenues by Service Line) (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenue from External Customer [Line Items]
Revenues		$ 547,938	$ 546,551	$ 1,585,350	$ 1,552,953
Percentage of reported revenue		100.00%	100.00%	100.00%	100.00%
Solid Waste Collection [Member]
Revenue from External Customer [Line Items]
Revenues		$ 353,240	$ 332,991	$ 1,020,928	$ 960,007
Percentage of reported revenue		64.50%	60.90%	64.40%	61.80%
Solid Waste Disposal and Transfer [Member]
Revenue from External Customer [Line Items]
Revenues		$ 114,120	$ 104,834	$ 307,318	$ 285,710
Percentage of reported revenue		20.80%	19.20%	19.40%	18.40%
Solid Waste Recycling [Member]
Revenue from External Customer [Line Items]
Revenues		$ 12,058	$ 14,476	$ 34,960	$ 43,112
Percentage of reported revenue		2.20%	2.60%	2.20%	2.80%
E&P Waste Treatment, Recovery and Disposal [Member]
Revenue from External Customer [Line Items]
Revenues		$ 51,176	$ 81,900	$ 172,224	$ 229,382
Percentage of reported revenue		9.30%	15.00%	10.90%	14.80%
Intermodal and Other [Member]
Revenue from External Customer [Line Items]
Revenues		$ 17,344	$ 12,350	$ 49,920	$ 34,742
Percentage of reported revenue		3.20%	2.30%	3.10%	2.20%
Intercompany Revenues [Member]
Revenue from External Customer [Line Items]
Revenues	[1]	$ (71,246)	$ (68,157)	$ (202,169)	$ (193,543)
Intercompany Revenues [Member] | Solid Waste Collection [Member]
Revenue from External Customer [Line Items]
Revenues		(1,250)	(926)	(3,150)	(2,676)
Intercompany Revenues [Member] | Solid Waste Disposal and Transfer [Member]
Revenue from External Customer [Line Items]
Revenues		(66,322)	(62,295)	(187,486)	(175,895)
Intercompany Revenues [Member] | Solid Waste Recycling [Member]
Revenue from External Customer [Line Items]
Revenues		(155)	(497)	(654)	(1,601)
Intercompany Revenues [Member] | E&P Waste Treatment, Recovery and Disposal [Member]
Revenue from External Customer [Line Items]
Revenues		(3,519)	(4,185)	(10,879)	(12,667)
Intercompany Revenues [Member] | Intermodal and Other [Member]
Revenue from External Customer [Line Items]
Revenues			(254)		(704)
Operating Segments [Member]
Revenue from External Customer [Line Items]
Revenues		619,184	614,708	1,787,519	1,746,496
Operating Segments [Member] | Solid Waste Collection [Member]
Revenue from External Customer [Line Items]
Revenues		354,490	333,917	1,024,078	962,683
Operating Segments [Member] | Solid Waste Disposal and Transfer [Member]
Revenue from External Customer [Line Items]
Revenues		180,442	167,129	494,804	461,605
Operating Segments [Member] | Solid Waste Recycling [Member]
Revenue from External Customer [Line Items]
Revenues		12,213	14,973	35,614	44,713
Operating Segments [Member] | E&P Waste Treatment, Recovery and Disposal [Member]
Revenue from External Customer [Line Items]
Revenues		54,695	86,085	183,103	242,049
Operating Segments [Member] | Intermodal and Other [Member]
Revenue from External Customer [Line Items]
Revenues		$ 17,344	$ 12,604	$ 49,920	$ 35,446

[1] Intercompany revenues reflect each segment's total intercompany sales, including intercompany sales within a segment and between segments. Transactions within and between segments are generally made on a basis intended to reflect the market value of the service.