Segment Reporting (Total Reported Revenues by Service Line) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Revenue from External Customer [Line Items]
Revenues	$ 524,693		$ 489,381		$ 1,006,402		$ 939,272
Intercompany Revenues [Member]
Revenue from External Customer [Line Items]
Revenues	(66,435)	[1]	(66,739)	[1]	(125,385)	[1]	(123,607)	[1]
Operating Segments [Member]
Revenue from External Customer [Line Items]
Revenues	591,128		556,120		1,131,787		1,062,879
Operating Segments [Member] | Solid Waste Collection [Member]
Revenue from External Customer [Line Items]
Revenues	322,763		306,472		628,766		599,616
Operating Segments [Member] | Solid Waste Disposal and Transfer [Member]
Revenue from External Customer [Line Items]
Revenues	158,913		153,600		294,476		276,371
Operating Segments [Member] | E&P Waste Treatment, Recovery and Disposal [Member]
Revenue from External Customer [Line Items]
Revenues	82,646		66,183		155,964		126,115
Operating Segments [Member] | Solid Waste Recycling [Member]
Revenue from External Customer [Line Items]
Revenues	14,836		18,610		29,739		37,404
Operating Segments [Member] | Intermodal and Other [Member]
Revenue from External Customer [Line Items]
Revenues	$ 11,970		$ 11,255		$ 22,842		$ 23,373

[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.