Segment Reporting (Tables)

3 Months Ended

Mar. 31, 2013

Summary of Financial Information Concerning Company's Reportable Segments

Summarized financial information concerning the Company’s reportable segments for the three months ended March 31, 2013 and 2012, is shown in the following tables:

Three Months Ended March 31, 2013	Gross Revenues		Intercompany Revenues(b)			Net Revenues		EBITDA(c)
Western	$	216,345	$	(23,194	)	$	193,151	$	58,576
Central		127,963		(13,370	)		114,593		40,238
Eastern		105,430		(17,660	)		87,770		25,881
E&P		57,021		(2,643	)		54,378		22,587
Corporate(a)		—		—			—		(2,604	)
	$	506,759	$	(56,867	)	$	449,892	$	144,678

Three Months Ended March 31, 2012	Gross Revenues		Intercompany Revenues(b)			Net Revenues		EBITDA(c)
Western	$	204,681	$	(24,021	)	$	180,660	$	53,802
Central		116,913		(13,084	)		103,829		35,450
Eastern		107,158		(18,121	)		89,037		24,534
E&P		2,904		—			2,904		1,932
Corporate(a)		—		—			—		(7,143	)
	$	431,656	$	(55,226	)	$	376,430	$	108,575

(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 three months ended March 31, 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		—		1			24		757		782
Balance as of March 31, 2013	$	373,143	$	421,217		$	380,585	$	462,394	$	1,637,339
	Western		Central			Eastern		E&P		Total
Balance as of December 31, 2011	$	313,038	$	424,223		$	379,627	$	—	$	1,116,888
Goodwill acquired		56,747		2,867			23		—		59,637
Goodwill divested		—		(496	)		—		—		(496	)
Balance as of March 31, 2012	$	369,785	$	426,594		$	379,650	$	—	$	1,176,029

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 March 31,
	2013			2012
Western segment EBITDA	$	58,576		$	53,802
Central segment EBITDA		40,238			35,450
Eastern segment EBITDA		25,881			24,534
E&P segment EBITDA		22,587			1,932
Subtotal reportable segments		147,282			115,718
Unallocated corporate overhead		(2,604	)		(7,143	)
Depreciation		(51,649	)		(37,173	)
Amortization of intangibles		(6,438	)		(5,631	)
Gain (loss) on disposal of assets		322			(715	)
Interest expense		(19,012	)		(12,285	)
Other income, net		742			819
Income before income tax provision	$	68,643		$	53,590

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 March 31,
	2013			2012
Solid waste collection	$	293,144		$	277,088
Solid waste disposal and transfer		122,772			117,739
E&P waste treatment, disposal and recovery		59,931			4,256
Solid waste recycling		18,794			21,215
Intermodal and other		12,118			11,358
		506,759			431,656
Less: intercompany elimination		(56,867	)		(55,226	)
Total revenues	$	449,892		$	376,430