Employee Benefit Plans Defined Benefit Plan - AOCI (Details) (USD $) In Thousands, unless otherwise specified	11 Months Ended	12 Months Ended		11 Months Ended	12 Months Ended		1 Months Ended
	Dec. 31, 2011 Successor company Qualified Pension	Dec. 31, 2013 Successor company Qualified Pension	Dec. 31, 2012 Successor company Qualified Pension	Dec. 31, 2011 Successor company Post-retirement Healthcare	Dec. 31, 2013 Successor company Post-retirement Healthcare	Dec. 31, 2012 Successor company Post-retirement Healthcare	Jan. 24, 2011 Predecessor company Qualified Pension	Jan. 24, 2011 Predecessor company Post-retirement Healthcare
Defined Benefit Plan Disclosure [Line Items]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Before Tax1	$ 71,573	$ (49,218)	$ 48,632	$ 162,021	$ (78,571)	$ 42,405	$ 0	$ 0
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, before Tax	70,861	(56,486)	45,974	161,718	(85,969)	36,211	(381)	(644)
Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), before Tax	0	0	0	0	0	0	(98)	(276)
Pension and Other Postretirement Benefit Plans, Accumulated Other Comprehensive Income (Loss), before Tax	(712)	(7,268)	(2,658)	(303)	(7,398)	(6,194)	(283)	(368)
Amortization or settlement	(2,069)	(2,156)	(4,870)	(6,727)	(3,694)	(8,941)	0	0
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract]
Total amount estimated to be amortized from accumulated other comprehensive income (loss) in the next fiscal year	$ (2,069)	$ (2,156)	$ (4,870)	$ (6,727)	$ (3,694)	$ (8,941)	$ 0	$ 0