Accounts Receivable (Company's Accounts Receivable And Securitized Accounts Receivable) (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011	Dec. 31, 2010
Accounts, Notes, Loans and Financing Receivable [Line Items]
Gross domestic accounts receivable	$ 96,029	$ 84,087
Gross securitized accounts receivable	325,000	280,000
Gross foreign receivables	467,726	413,019
Total gross receivables	888,755	777,106
Less allowance for doubtful accounts	(17,959)	(15,315)	(16,345)	(14,256)
Net accounts and securitized accounts receivable	$ 870,796	$ 761,791