CONSOLIDATED BALANCE SHEET (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012 Successor [Member]	Dec. 31, 2011 Predecessor [Member]
Current assets:
Cash and cash equivalents	$ 52	$ 50
Accounts receivable, billed and unbilled, net of allowances of nil and $993, respectively	74,135	75,775
Accounts receivable - related parties	34,974	6,319
Natural gas imbalances - receivable	48,244	52,939
Note receivable - related party	0	342,386
System natural gas and operating supplies	92,658	114,739
Other	20,665	20,886
Total current assets	270,728	613,094
Property, plant and equipment:
Plant in service	4,237,913	4,045,688
Construction work in progress	60,058	41,828
Property, Plant and Equipment, Gross	4,297,971	4,087,516
Less accumulated depreciation and amortization	2,847	733,228
Net property, plant and equipment	4,295,124	3,354,288
Goodwill	925,824	0
Note receivable - related party	775,730	688,330
Other	112,406	19,325
Total assets	6,379,812	4,675,037
Partners' Capital
Partners' capital	3,225,172	1,809,346
Accumulated other comprehensive loss	0	(16,176)
Tax sharing note receivable - related party	0	(1,156)
Total partners' capital	3,225,172	1,792,014
Long-term debt	1,779,568	1,624,229
Total capitalization	5,004,740	3,416,243
Current liabilities:
Current portion of long-term debt	0	342,386
Accounts payable	9,727	13,295
Accounts payable - related parties	168,908	52,055
Natural gas imbalances - payable	115,242	144,697
Accrued taxes	17,699	17,541
Accrued interest	23,049	14,280
Capital Accruals	6,866	10,814
Other	52,384	55,146
Total current liabilities	393,875	650,214
Deferred income taxes, net	862,681	538,284
Other	118,516	70,296
Commitments and contingencies	0	0
Total partners' capital and liabilities	$ 6,379,812	$ 4,675,037