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Segment Information (Reconciliation Of Total Segment Margin To Net Income (Loss) From Continuing Operations Before Income Taxes) (Details) (USD $)
In Thousands
9 Months Ended3 Months Ended4 Months Ended9 Months Ended4 Months Ended3 Months Ended4 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2011
Successor [Member]
Operating Segments [Member]
Sep. 30, 2010
Successor [Member]
Operating Segments [Member]
Sep. 30, 2010
Successor [Member]
Operating Segments [Member]
Sep. 30, 2011
Successor [Member]
Operating Segments [Member]
May 25, 2010
Predecessor [Member]
Operating Segments [Member]
May 25, 2010
Predecessor [Member]
Sep. 30, 2011
Successor [Member]
Sep. 30, 2010
Successor [Member]
Sep. 30, 2010
Successor [Member]
Sep. 30, 2011
Successor [Member]
Total segment margin$ 59,991$ 110,741$ 83,856$ 110,662$ 308,755$ 147,272$ (4,946)$ 30,849$ 7,846$ 2,951$ 59,991
Operation and maintenance      (47,842)(37,950)(34,306)(44,708)(105,506)
General and administrative      (37,212)(17,350)(18,072)(25,176)(54,010)
Gain (loss) on asset sales, net      (303)131(200)(210)(50)
Depreciation and amortization      (41,784)(41,956)(32,205)(42,750)(122,695)
Income from unconsolidated affiliates      15,87230,94621,75429,87586,921
Interest expense, net      (36,321)(28,852)(20,379)(28,460)(73,548)
Other income and deductions, net      (3,897)15,0507,5244,00320,105
INCOME (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES      $ (4,215)$ 30,760$ 7,972$ 3,236$ 59,972