CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (UNAUDITED) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012 Successor [Member]	Jun. 30, 2012 Successor [Member]	Mar. 25, 2012 Predecessor [Member]	Jun. 30, 2011 Predecessor [Member]	Jun. 30, 2011 Predecessor [Member]
Net earnings (loss)	$ 11,725	$ (26,782)	$ 49,917	$ 59,773	$ 120,435
Other comprehensive income (loss), net of tax:
Change in fair value of interest rate hedges	0	0	3,878	(11,587)	(12,991)
Reclassification of unrealized loss on interest rate hedges into earnings	0	0	4,946	3,362	6,685
Change in fair value of commodity hedges	6,134	7,277	2,954	344	(649)
Reclassification of unrealized gain on commodity hedges into earnings	(3,541)	(3,541)	(1,307)	(2,977)	(5,874)
Reclassificcation of net actuarial loss and prior service credit relating to pension and other postretirement benefits into earnings	0	0	1,815	706	1,407
Change in other comprehensive income from equity investments	198	198	29	37	72
Other comprehensive income (loss), net of tax	2,791	3,934	12,315	(10,115)	(11,350)
Comprehensive income (loss)	$ 14,516	$ (22,848)	$ 62,232	$ 49,658	$ 109,085