CONDENSED CONSOLIDATED BALANCE SHEET (UNAUDITED) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012 Successor [Member]	Dec. 31, 2011 Predecessor [Member]
Current assets:
Cash and cash equivalents	$ 54	$ 50
Accounts receivable, billed and unbilled, net of allowances of nil and $993, respectively	63,139	75,775
Accounts receivable - related parties	4,604	6,319
Natural gas imbalances - receivable	40,414	52,939
Note receivable - related party	0	342,386
System natural gas and operating supplies	109,667	114,739
Other	18,321	20,886
Total current assets	236,199	613,094
Property, plant and equipment:
Plant in service	4,072,932	4,045,688
Construction work in progress	57,201	41,828
Total property, plant and equipment:	4,130,133	4,087,516
Less: accumulated depreciation and amortization	38,093	733,228
Net property, plant and equipment	4,092,040	3,354,288
Goodwill	938,438	0
Note receivable - related party	710,480	688,330
Other	121,329	19,325
Total assets	6,098,486	4,675,037
Current liabilities:
Current portion of long-term debt	0	342,386
Accounts payable	12,150	13,295
Accounts payable - related parties	47,859	52,055
Natural gas imbalances - payable	119,482	144,697
Accrued taxes	18,771	17,541
Accrued interest	13,223	14,280
Capital accruals	9,144	10,814
Other	51,137	55,146
Total current liabilities	271,766	650,214
Long-term debt	1,771,993	1,624,229
Deferred income taxes, net	799,248	538,284
Other	122,936	70,296
Commitments and contingencies
Partners' capital:
Partners' capital	3,133,122	1,809,346
Accumulated other comprehensive loss	0	(16,176)
Tax sharing note receivable - related party	(579)	(1,156)
Total partners' capital	3,132,543	1,792,014
Total partners' capital and liabilities	$ 6,098,486	$ 4,675,037