Segment Reporting (Tables)

6 Months Ended

Jun. 30, 2013

Summary of Financial Information Concerning Company's Reportable Segments

Summarized financial information concerning the Company’s reportable segments for the three and six months ended June 30, 2013 and 2012, is shown in the following tables:

Three Months Ended June 30, 2013	Gross Revenues		Intercompany Revenues(b)			Net Revenues		EBITDA(c)
Western	$	229,510	$	(26,677	)	$	202,833	$	62,386
Central		147,210		(16,776	)		130,434		48,517
Eastern		115,542		(19,817	)		95,725		29,029
E&P		63,858		(3,469	)		60,389		28,324
Corporate(a)		—		—			—		(262	)
	$	556,120	$	(66,739	)	$	489,381	$	167,994
Three Months Ended June 30, 2012	Gross Revenues		Intercompany Revenues(b)			Net Revenues		EBITDA(c)
Western	$	227,092	$	(25,548	)	$	201,544	$	58,890
Central		127,805		(15,125	)		112,680		40,167
Eastern		112,972		(19,336	)		93,636		27,231
E&P		2,871		—			2,871		1,957
Corporate(a)		—		—			—		(688	)
	$	470,740	$	(60,009	)	$	410,731	$	127,557
Six Months Ended June 30, 2013	Gross Revenues		Intercompany Revenues(b)			Net Revenues		EBITDA(c)
Western	$	445,856	$	(49,872	)	$	395,984	$	120,962
Central		275,173		(30,146	)		245,027		88,755
Eastern		220,971		(37,477	)		183,494		54,909
E&P		120,879		(6,112	)		114,767		50,912
Corporate(a)		—		—			—		(2,867	)
	$	1,062,879	$	(123,607	)	$	939,272	$	312,671

Six Months Ended June 30, 2012	Gross Revenues		Intercompany Revenues(b)			Net Revenues		EBITDA(c)
Western	$	431,773	$	(49,570	)	$	382,203	$	112,692
Central		244,718		(28,208	)		216,510		75,617
Eastern		220,130		(37,457	)		182,673		51,766
E&P		5,775		—			5,775		3,888
Corporate(a)		—		—			—		(7,831	)
	$	902,396	$	(115,235	)	$	787,161	$	236,132

(a) Corporate functions include accounting, legal, tax, treasury, information technology, risk management, human resources, training and other administrative functions. Amounts reflected are net of allocations to the four operating segments.

(b) 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.

(c) For those items included in the determination of EBITDA, the accounting policies of the segments are the same as those described in the Company’s most recent Annual Report on Form 10-K.

Changes In Goodwill by Reportable Segment

The following tables show changes in goodwill during the six months ended June 30, 2013 and 2012, by reportable segment:

	Western		Central			Eastern		E&P		Total
Balance as of December 31, 2012	$	373,143	$	430,412		$	380,561	$	452,441	$	1,636,557
Goodwill transferred		—		(9,196	)		—		9,196		—
Goodwill acquired		521		52			149		881		1,603
Balance as of June 30, 2013	$	373,664	$	421,268		$	380,710	$	462,518	$	1,638,160
	Western		Central			Eastern		E&P		Total
Balance as of December 31, 2011	$	313,038	$	424,223		$	379,627	$	—	$	1,116,888
Goodwill acquired		60,538		5,153			18		—		65,709
Goodwill divested		—		(496	)		—		—		(496	)
Balance as of June 30, 2012	$	373,576	$	428,880		$	379,645	$	—	$	1,182,101

Reconciliation of Company's Primary Measure of Segment Profitability to Income Before Income Tax Provision

A reconciliation of the Company’s primary measure of segment profitability (EBITDA) to Income before income tax provision in the Condensed Consolidated Statements of Net Income is as follows:

	Three months ended June 30,						Six months ended June 30,
	2013			2012			2013			2012
Western segment EBITDA	$	62,386		$	58,890		$	120,962		$	112,692
Central segment EBITDA		48,517			40,167			88,755			75,617
Eastern segment EBITDA		29,029			27,231			54,909			51,766
E&P segment EBITDA		28,324			1,957			50,912			3,888
Subtotal reportable segments		168,256			128,245			315,538			243,963
Unallocated corporate overhead		(262	)		(688	)		(2,867	)		(7,831	)
Depreciation		(54,766	)		(39,846	)		(106,414	)		(77,018	)
Amortization of intangibles		(6,211	)		(6,217	)		(12,650	)		(11,849	)
Gain (loss) on disposal of assets		(3,445	)		243			(3,122	)		(472	)
Loss on prior corporate office lease		(10,498	)		—			(10,498	)		—
Interest expense		(18,928	)		(11,829	)		(37,940	)		(24,114	)
Other income (expense), net		(1,706	)		20			(965	)		838
Income before income tax provision	$	72,440		$	69,928		$	141,082		$	123,517

Total Reported Revenues by Service Line

The following table shows, for the periods indicated, the Company’s total reported revenues by service line and with intercompany eliminations:

	Three months ended June 30,						Six months ended June 30,
	2013			2012			2013			2012
Solid waste collection	$	306,472		$	299,666		$	599,616		$	576,754
Solid waste disposal and transfer		153,600			130,544			276,371			248,283
E&P waste treatment, disposal and recovery		66,183			5,378			126,115			9,634
Solid waste recycling		18,610			21,883			37,404			43,097
Intermodal and other		11,255			13,269			23,373			24,628
		556,120			470,740			1,062,879			902,396
Less: intercompany elimination		(66,739	)		(60,009	)		(123,607	)		(115,235	)
Total revenues	$	489,381		$	410,731		$	939,272		$	787,161