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Income Taxes Income Tax Accrued Interest and Penalties (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 Successor [Member]	Sep. 30, 2010 Predecessor [Member]	Jun. 30, 2010 Predecessor [Member]	Jun. 30, 2009 Predecessor [Member]
Accrued Interest and Penalties [Line Items]
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	$ 18,947	$ 24,623	$ 21,379	$ 16,030	$ 13,063	$ 12,097	$ 10,312
Unrecognized Tax Benefits, Additional Interest Accrued	2,917	3,244	2,432		966	1,785
Unrecognized Tax Benefits, Income Tax Penalties Accrued	9,063	11,979	9,965	9,102	8,673	8,474	7,887
Unrecognized Tax Benefits, Additional Penalties Accrued	$ (39)	$ 2,014	$ 902		$ 199	$ 587

This element represents the amount of statutory penalties accrued as of the date of the statement of financial position for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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- Definition

This element represents the amount of interest expense accrued as of the date of the statement of financial position for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity.

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