Accounts Receivable (Company's Accounts Receivable And Securitized Accounts Receivable) (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2011	Dec. 31, 2010
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross domestic accounts receivable	$ 99,573	$ 84,087
Gross securitized accounts receivable	355,000	280,000
Gross foreign receivables	499,240	413,019
Total gross receivables	953,813	777,106
Less allowance for doubtful accounts	(19,995)	(15,315)	(14,966)	(14,256)
Net accounts and securitized accounts receivable	$ 933,818	$ 761,791