Income Taxes Income Before Income Taxes, Domestic and Foreign (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended		3 Months Ended	12 Months Ended
	Dec. 31, 2010 Successor [Member]	Dec. 31, 2012 Successor [Member]	Dec. 31, 2011 Successor [Member]	Sep. 30, 2010 Predecessor [Member]	Jun. 30, 2010 Predecessor [Member]
Schedule of Income Before Income Tax, Domestic and Foreign [Line Items]
Income (Loss) from Continuing Operations before Income Taxes, Domestic	$ 127,779	$ 732,430	$ 610,351	$ 89,246	$ 354,848
Income (Loss) from Continuing Operations before Income Taxes, Foreign	1,487	11,786	11,467	1,390	(1,409)
Income (Loss) from Continuing Operations Attributable to Parent	$ 129,266	$ 744,216	$ 621,818	$ 90,636	$ 353,439