Summary Of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2011

Summary Of Significant Accounting Policies [Abstract]

Company's Accounts Receivable And Securitized Accounts Receivable

	2011			2010
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	)
Net accounts receivable	$	761,791		$	404,163

Allowance For Doubtful Accounts Related To Accounts Receivable

	2011			2010			2009
Allowance for doubtful accounts beginning of year	$	14,256		$	14,764		$	10,407
Add:
Provision for bad debts		19,226			18,883			32,593
Less:
Write-offs		(18,167	)		(19,391	)		(28,236	)
Allowance for doubtful accounts end of year	$	15,315		$	14,256		$	14,764