Comprehensive Income (Loss) 1 (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	3 Months Ended
	Mar. 31, 2012 Successor [Member]	Mar. 25, 2012 Predecessor [Member]	Mar. 31, 2011 Predecessor [Member]
Other Comprehensive Income Loss Tax [Line Items]
Change in fair value of interest rate hedges	$ 0	$ 2,296	$ (866)
Reclassification of unrealized loss (gain) on interest rate hedges	0	3,139	2,228
Change in fair value of commodity hedges	643	1,665	(559)
Reclassification of unrealized (gain) loss on commodity hedges into earnings	0	(736)	(1,632)
Reclassification of net actuarial loss and prior service credit relating to pension and other postretirement benefits into earnings	0	902	574
Change in other comprehensive income (loss) from equity investments	0	18	22
Tax benefit (expense) included in other comprehensive income (loss)	$ 643	$ 7,284	$ (233)