Summary Of Significant Accounting Policies (Company's Accounts Receivable And Securitized Accounts Receivable) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Summary Of Significant Accounting Policies [Abstract]
Gross domestic retained receivables	$ 84,087	$ 160,641
Securitized gross accounts receivable	280,000	144,000
Gross foreign receivables	413,019	113,778
Total gross receivables	777,106	418,419
Less allowance for doubtful accounts	(15,315)	(14,256)	(14,764)	(10,407)
Net accounts receivable	$ 761,791	$ 404,163