Valuation And Qualifying Accounts (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Allowance for Doubtful Accounts
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 32,635		$ 30,142		$ 22,975
Charged to Expenses	10,278		12,868		18,147
Write-Offs Net of, Recoveries	(7,364)		(10,375)		(10,980)
Balance at end of Year	35,549		32,635		30,142
Valuation Allowance of Deferred Tax Assets
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	51,503		53,140		60,176
Charged to Expenses	(4,595)		(82)		(5,975)
Charged (Credited) to Other Accounts	(10,218)	[1]	(1,555)	[1]	(1,061)	[1]
Balance at end of Year	$ 36,690		$ 51,503		$ 53,140

[1] Amounts not charged (credited) to expenses are charged (credited) to stockholders' equity, deferred tax assets (liabilities), or goodwill.