Restatement Of Condensed Consolidated Financial Statements (Condensed Consolidated Balance Sheet) (Parenthetical) (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011 As Reported [Member]	Jun. 30, 2011 Restated [Member]
Allowance for doubtful accounts	$ 27,387	$ 24,510	$ 34,586	$ 35,554
Common Stock, par value	$ 0.01	$ 0.01	$ 0.01	$ 0.01
Common Stock, shares authorized	120,000,000	120,000,000	120,000,000,000	72,732,559,000
Common Stock, shares issued	73,129,194	72,740,302	72,732,559,000	72,732,559,000
Common Stock, shares outstanding	73,129,194	72,740,302	72,732,559,000	72,732,559,000
Treasury Stock, shares	246,037	246,037	246,037,000	246,037,000