Parent Company Stock Based Compensation (Details) (USD $)	3 Months Ended	12 Months Ended
	Sep. 30, 2010	Dec. 31, 2012	Dec. 31, 2011	Jun. 30, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Salary Stock Modification		$ (14,731,000)
Share-based Compensation	5,019,000	3,716,000	17,106,000	15,115,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized		10,000,000		1,100,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value		9,400,000	15,700,000
Number Of Shares Settled		111,000
Total Payment for Restricted Stock Units Settled In Cash		2,500,000
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation		16,500,000
Successor [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation			17,100,000
Stock Based Compensation, Net of Tax		$ 10,200,000	$ 10,600,000