Income Taxes Benefit (Expense) (Details) (USD $) In Thousands, unless otherwise specified	1 Months Ended	11 Months Ended	12 Months Ended
	Jan. 24, 2011 Predecessor company	Dec. 31, 2011 Successor company	Dec. 31, 2013 Successor company	Dec. 31, 2012 Successor company
Assets:
Federal	$ 0	$ 913	$ (924)	$ 0
State and local	(21)	160	(3,154)	(1,218)
Total current income tax (expense) benefit	(21)	1,073	(4,078)	(1,218)
Investment tax credits	0	0	0	0
Deferred:
Federal	(247,844)	49,001	77,341	77,010
State and local	(32,024)	3,202	17,028	19,768
Total deferred income tax benefit (expense)	(279,868)	52,203	94,369	96,778
Total income tax benefit (expense)	$ (279,889)	$ 53,276	$ 90,291	$ 95,560