Consolidated Statements of Comprehensive (Loss) Income (USD $) In Thousands, unless otherwise specified	11 Months Ended	12 Months Ended		1 Months Ended
	Dec. 31, 2011 Successor company	Dec. 31, 2013 Successor company	Dec. 31, 2012 Successor company	Jan. 24, 2011 Predecessor company
Net (loss) income	$ (414,945)	$ (93,450)	$ (153,294)	$ 586,907
Other comprehensive income, net of taxes:
Interest rate swaps (net of $0.4 million tax benefit)	0	(601)	0	0
Qualified pension and post-retirement healthcare plans (net of $45.6 million tax expense, $19.7 million tax benefit, $39.1 million tax benefit and $0.5 million tax expense, respectively)	(193,494)	96,811	(62,495)	493
Total other comprehensive income (loss)	(193,494)	96,210	(62,495)	493
Comprehensive income (loss)	$ (608,439)	$ 2,760	$ (215,789)	$ 587,400