Valuation And Qualifying Accounts (Detail) (USD $) In Thousands, unless otherwise specified	7 Months Ended	12 Months Ended
	Dec. 31, 2010	Dec. 31, 2012	Dec. 31, 2011	May 31, 2010
Valuation and Qualifying Accounts Disclosure [Line Items]
Beginning Balance	$ 8,531	$ 12,505	$ 11,321	$ 6,870
Charged to Expenses/Against Revenue	6,140	37,447	10,059	7,785
Write-Offs, Net of Recoveries	(3,350)	(12,114)	(8,875)	(6,124)
Ending Balance	$ 11,321	$ 37,838	$ 12,505	$ 8,531