Segment Information (Tables)

3 Months Ended

Mar. 31, 2012

Segment Information [Abstract]

Amounts Related To Balance Sheets For Each Segment

Results for each period, together with amounts related to balance sheets for each segment, are shown below:

	Three Months Ended March 31,
	2012			2011
External Revenues
Gathering and Processing	$	307,167		$	265,972
Joint Ventures	—			—
Contract Compression	37,201			38,436
Contract Treating	9,135			8,433
Corporate and Others	4,396			4,411
Eliminations	—			—
Total	$	357,899		$	317,252
Intersegment Revenues
Gathering and Processing	$	—		$	—
Joint Ventures	—			—
Contract Compression	4,129			6,553
Contract Treating	494			—
Corporate and Others	56			67
Eliminations	(4,679		)	(6,620		)
Total	$	—		$	—
Segment Margin
Gathering and Processing	$	71,335		$	53,800
Joint Ventures	—			—
Contract Compression	38,986			41,440
Contract Treating	7,883			7,251
Corporate and Others	4,648			5,053
Eliminations	(4,606		)	(6,553		)
Total	$	118,246		$	100,991
Operation and Maintenance
Gathering and Processing	$	28,223		$	22,942
Joint Ventures	—			—
Contract Compression	16,407			16,504
Contract Treating	844			734
Corporate and Others	113			45
Eliminations	(4,606		)	(6,553		)
Total	$	40,981		$	33,672

Reconciliation Of Total Segment Margin To Net Income (Loss) From Continuing Operations Before Income Taxes

The table below provides a reconciliation of total segment margin to income before income taxes:

	Three Months Ended March 31,
	2012				2011
Total segment margin	$	118,246			$	100,991
Operation and maintenance	(40,981		)		(33,672		)
General and administrative	(15,695		)		(18,997		)
Loss on asset sales, net	(36		)		(28		)
Depreciation and amortization	(51,506		)		(40,236		)
Income from unconsolidated affiliates	31,958				23,808
Interest expense, net	(29,557		)		(20,007		)
Other income and deductions, net	16,522			*	2,414
Income before income taxes	$	28,951			$	14,273

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* Other income and deductions, net for the three months ended March 31, 2012 included a one-time producer payment of $15.6 million related to an assignment of certain contracts.

Schedule Of Assets Related To Balance Sheet

The table below provides a listing of assets reflected in the consolidated balance sheet for each segment:

	March 31, 2012		December 31, 2011
Gathering and Processing	$	1,978,072	$	1,959,697
Joint Ventures	2,007,414		1,924,705
Contract Compression	1,395,797		1,405,600
Contract Treating	211,593		215,172
Corporate and Others	126,769		62,682
Total	$	5,719,645	$	5,567,856