Geographic Information (Summary Of Revenues By Geographic Area) (Details) (USD $) In Thousands, unless otherwise specified	7 Months Ended		12 Months Ended
	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2011	May 31, 2010	May 31, 2009
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 613,309	$ 383,479	$ 1,444,077	$ 704,502	$ 548,439
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	598,403		1,389,215	704,502	548,439
Canada [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	11,742		27,076	0	0
Other International [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 3,164		$ 27,786	$ 0	$ 0