Derivative Financial Instruments And Hedging Activities Derivatives Income (Losses) Recognized in Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended	3 Months Ended		12 Months Ended		3 Months Ended	12 Months Ended		3 Months Ended		9 Months Ended	12 Months Ended			3 Months Ended	12 Months Ended	3 Months Ended		12 Months Ended
	Dec. 31, 2012	Sep. 30, 2011 Successor [Member]	Dec. 31, 2010 Successor [Member]	Dec. 31, 2012 Successor [Member]	Dec. 31, 2011 Successor [Member]	Dec. 31, 2010 Successor [Member] Cash Flow Hedging [Member]	Dec. 31, 2012 Successor [Member] Cash Flow Hedging [Member]	Dec. 31, 2011 Successor [Member] Cash Flow Hedging [Member]	Dec. 31, 2010 Predecessor [Member]	Sep. 30, 2010 Predecessor [Member]	Sep. 30, 2011 Predecessor [Member]	Dec. 31, 2012 Predecessor [Member]	Dec. 31, 2011 Predecessor [Member]	Jun. 30, 2010 Predecessor [Member]	Sep. 30, 2010 Predecessor [Member] Cash Flow Hedging [Member]	Jun. 30, 2010 Predecessor [Member] Cash Flow Hedging [Member]	Dec. 31, 2010 Interest Rate Swap And Cap Agreements [Member] Interest Rate Swap [Member]	Sep. 30, 2010 Interest Rate Swap And Cap Agreements [Member] Interest Rate Swap [Member]	Dec. 31, 2012 Interest Rate Swap And Cap Agreements [Member] Interest Rate Swap [Member]	Dec. 31, 2011 Interest Rate Swap And Cap Agreements [Member] Interest Rate Swap [Member]	Jun. 30, 2010 Interest Rate Swap And Cap Agreements [Member] Interest Rate Swap [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments	$ 200	$ 424		$ 362	$ 525	$ 1,060	$ 362	$ (1,701)			$ 12,042				$ 5,478	$ 13,248
Gain (Loss) on Foreign Currency Derivative Instruments Not Designated as Hedging Instruments						(535)		2,125							(383)	(1,206)
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings																	(1,092)	(85)	(120)	1,090	394
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net			(464)	(66)	(50)					(8,218)				(36,761)
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net									$ (52)	$ (14,473)		$ 2,383	$ (2,902)	$ (80,067)