Supplemental Disclosure for Accumulated Other Comprehensive Income Supplemental Disclosure for Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended			3 Months Ended	12 Months Ended		3 Months Ended	12 Months Ended
	Dec. 31, 2010	Sep. 30, 2010	Dec. 31, 2012	Dec. 31, 2011	Jun. 30, 2010	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]	Jun. 30, 2009 Predecessor [Member]
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	$ (170)	$ (3,001)	$ (43)	$ 646	$ (13,333)
Other Comprehensive Income (Loss), Reclassification Adjustment on Derivatives Included in Net Income, Tax	19	5,285	(876)	400	28,948
Other Comprehensive Income (Loss), Foreign Currency Translation Gain (Loss) Arising During Period, Tax	0	743	0	0	2,952
Unrealized Gains (Losses) On Cash Flow Hedges						(261)	(5)	1,545	(30,847)	(34,818)	(62,509)
Changes in Fair Value On Cash Flow Hedges, Net of Tax						(294)	(43)	(696)	(5,217)	(23,428)
Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net						33	(1,507)	2,502	9,188	51,119
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax						1,819	(3,249)	(9,162)	48,000	46,688	41,410
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax						1,819	5,913	(10,981)	1,312	5,278
Accumulated Other Comprehensive Income (Loss), Net of Tax			$ (3,254)	$ (7,617)		$ 1,558	$ (3,254)	$ (7,617)	$ 17,153	$ 11,870