Segment Reporting (Total Reported Revenues by Service Line) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Revenue from External Customer [Line Items]
Revenues	$ 526,213	$ 546,551	$ 524,693	$ 481,710	$ 485,877	$ 503,646	$ 489,381	$ 449,892	$ 2,079,166		$ 1,928,795		$ 1,661,618
Percentage of reported revenue									100.00%		100.00%		100.00%
Solid Waste Collection [Member]
Revenue from External Customer [Line Items]
Revenues									1,286,313		1,214,787		1,170,788
Percentage of reported revenue									61.90%		63.00%		70.40%
Solid Waste Disposal and Transfer [Member]
Revenue from External Customer [Line Items]
Revenues									381,310		352,482		308,990
Percentage of reported revenue									18.30%		18.30%		18.60%
Solid Waste Recycling [Member]
Revenue from External Customer [Line Items]
Revenues									56,108		65,730		72,790
Percentage of reported revenue									2.70%		3.40%		4.40%
E&P Waste Treatment, Recovery and Disposal [Member]
Revenue from External Customer [Line Items]
Revenues									310,072		250,824		59,808
Percentage of reported revenue									14.90%		13.00%		3.60%
Intermodal and Other [Member]
Revenue from External Customer [Line Items]
Revenues									45,363		44,972		49,242
Percentage of reported revenue									2.20%		2.30%		3.00%
Intercompany Revenues [Member]
Revenue from External Customer [Line Items]
Revenues									(259,352)	[1]	(249,830)	[1]	(232,759)	[1]
Intercompany Revenues [Member] | Solid Waste Collection [Member]
Revenue from External Customer [Line Items]
Revenues									(3,593)		(4,304)		(5,545)
Intercompany Revenues [Member] | Solid Waste Disposal and Transfer [Member]
Revenue from External Customer [Line Items]
Revenues									(235,851)		(226,897)		(215,871)
Intercompany Revenues [Member] | Solid Waste Recycling [Member]
Revenue from External Customer [Line Items]
Revenues									(2,118)		(6,101)		(8,722)
Intercompany Revenues [Member] | E&P Waste Treatment, Recovery and Disposal [Member]
Revenue from External Customer [Line Items]
Revenues									(16,862)		(11,462)		(1,542)
Intercompany Revenues [Member] | Intermodal and Other [Member]
Revenue from External Customer [Line Items]
Revenues									(928)		(1,066)		(1,079)
Operating Segments [Member]
Revenue from External Customer [Line Items]
Revenues									2,338,518		2,178,625		1,894,377
Operating Segments [Member] | Solid Waste Collection [Member]
Revenue from External Customer [Line Items]
Revenues									1,289,906		1,219,091		1,176,333
Operating Segments [Member] | Solid Waste Disposal and Transfer [Member]
Revenue from External Customer [Line Items]
Revenues									617,161		579,379		524,861
Operating Segments [Member] | Solid Waste Recycling [Member]
Revenue from External Customer [Line Items]
Revenues									58,226		71,831		81,512
Operating Segments [Member] | E&P Waste Treatment, Recovery and Disposal [Member]
Revenue from External Customer [Line Items]
Revenues									326,934		262,286		61,350
Operating Segments [Member] | Intermodal and Other [Member]
Revenue from External Customer [Line Items]
Revenues									$ 46,291		$ 46,038		$ 50,321

[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.