CONDENSED CONSOLIDATED STATEMENT 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]
Statement of Income and Comprehensive Income [Line Items]
Net earnings	$ 29,709	$ 10,769	$ 40,482	$ 40,219	$ 85,831
Other comprehensive income (loss), net of tax:
Reclassification of unrealized loss on interest rate hedges into earnings	0	0	2,515	3,260	6,482
Change in fair value of interest rate hedges	0	0	0	(361)	(789)
Reclassification of prior service cost (credit) relating to other postretirement benefits into earnings	0	0	398	(378)	(756)
Total other comprehensive income, net of tax	0	0	2,913	2,521	4,937
Comprehensive income	$ 29,709	$ 10,769	$ 43,395	$ 42,740	$ 90,768