Comprehensive Income (Loss) 1 (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended	3 Months Ended		9 Months Ended
	Sep. 30, 2012 Successor [Member]	Sep. 30, 2012 Successor [Member]	Mar. 25, 2012 Predecessor [Member]	Sep. 30, 2011 Predecessor [Member]	Sep. 30, 2011 Predecessor [Member]
Income tax expense included in other comprehensive income (loss):
Change in fair value of interest rate hedges	$ 0	$ 0	$ 2,296	$ (18,697)	$ (26,454)
Reclassification of unrealized loss on interest rate hedges into earnings	0	0	3,139	2,294	6,775
Change in fair value of commodity hedges	(1,992)	2,108	1,665	3,039	2,674
Reclassification of unrealized gain on commodity hedges into earnings	(2,166)	(4,161)	(736)	(2,017)	(5,327)
Reclassification of net actuarial loss and prior service credit relating to pension and other postretirement benefits into earnings	0	0	902	566	1,708
Change in other comprehensive income from equity investments	0	0	18	23	66
Income tax expense included in other comprehensive income (loss)	$ (4,158)	$ (2,053)	$ 7,284	$ (14,792)	$ (20,558)