Income Taxes Unrecognized Tax Benefits Reconciliation (Details) (USD $) In Thousands, unless otherwise specified						3 Months Ended	12 Months Ended		3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Sep. 30, 2010 Predecessor [Member]	Jun. 30, 2010 Predecessor [Member]	Jun. 30, 2009 Predecessor [Member]	Dec. 31, 2010 Successor [Member]	Dec. 31, 2012 Successor [Member]	Dec. 31, 2011 Successor [Member]	Sep. 30, 2010 Successor [Member]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Unrecognized Tax Benefits	$ 28,100	$ 26,500	$ 21,400	$ 18,500	$ 17,600	$ 42,676	$ 42,502	$ 34,971	$ 127,642	$ 53,390	$ 48,056	$ 139,068
Unrecognized Tax Benefits, Increases Resulting from Prior Period Tax Positions							3,186		131	978	471
Unrecognized Tax Benefits, Decreases Resulting from Prior Period Tax Positions							(4,901)		(12,012)	(1,934)	(91,195)
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions						174	12,907		455	9,522	11,381
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations							(218)			(286)	(243)
Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities							$ (3,443)			$ (2,946)