Segment Reporting (Total Reported Revenues by Service Line) (Detail) - USD ($) $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenue from External Customer [Line Items]
Revenues		$ 531,937	$ 547,938	$ 531,312	$ 506,100	$ 526,213	$ 546,551	$ 524,693	$ 481,710	$ 2,117,287	$ 2,079,166	$ 1,928,795
Percentage of reported revenue										100.00%	100.00%	100.00%
Solid Waste Collection
Revenue from External Customer [Line Items]
Revenues										$ 1,374,056	$ 1,286,313	$ 1,214,787
Percentage of reported revenue										64.90%	61.90%	63.00%
Solid Waste Disposal and Transfer
Revenue from External Customer [Line Items]
Revenues										$ 415,169	$ 381,310	$ 352,482
Percentage of reported revenue										19.60%	18.30%	18.30%
Solid Waste Recycling
Revenue from External Customer [Line Items]
Revenues										$ 46,368	$ 56,108	$ 65,730
Percentage of reported revenue										2.20%	2.70%	3.40%
E&P Waste Treatment, Recovery and Disposal [Member]
Revenue from External Customer [Line Items]
Revenues										$ 215,373	$ 310,072	$ 250,824
Percentage of reported revenue										10.20%	14.90%	13.00%
Intermodal and Other
Revenue from External Customer [Line Items]
Revenues										$ 66,321	$ 45,363	$ 44,972
Percentage of reported revenue										3.10%	2.20%	2.30%
Intercompany Revenues [Member]
Revenue from External Customer [Line Items]
Revenues	[1]									$ (273,903)	$ (259,352)	$ (249,830)
Intercompany Revenues [Member] | Solid Waste Collection
Revenue from External Customer [Line Items]
Revenues										(4,623)	(3,593)	(4,304)
Intercompany Revenues [Member] | Solid Waste Disposal and Transfer
Revenue from External Customer [Line Items]
Revenues										(255,200)	(235,851)	(226,897)
Intercompany Revenues [Member] | Solid Waste Recycling
Revenue from External Customer [Line Items]
Revenues										(924)	(2,118)	(6,101)
Intercompany Revenues [Member] | E&P Waste Treatment, Recovery and Disposal [Member]
Revenue from External Customer [Line Items]
Revenues										(13,156)	(16,862)	(11,462)
Intercompany Revenues [Member] | Intermodal and Other
Revenue from External Customer [Line Items]
Revenues											(928)	(1,066)
Operating Segments [Member]
Revenue from External Customer [Line Items]
Revenues										2,391,190	2,338,518	2,178,625
Operating Segments [Member] | Solid Waste Collection
Revenue from External Customer [Line Items]
Revenues										1,378,679	1,289,906	1,219,091
Operating Segments [Member] | Solid Waste Disposal and Transfer
Revenue from External Customer [Line Items]
Revenues										670,369	617,161	579,379
Operating Segments [Member] | Solid Waste Recycling
Revenue from External Customer [Line Items]
Revenues										47,292	58,226	71,831
Operating Segments [Member] | E&P Waste Treatment, Recovery and Disposal [Member]
Revenue from External Customer [Line Items]
Revenues										228,529	326,934	262,286
Operating Segments [Member] | Intermodal and Other
Revenue from External Customer [Line Items]
Revenues										$ 66,321	$ 46,291	$ 46,038

[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.