Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Company's Accounts Receivable and Securitized Accounts Receivable

The Company’s accounts receivable and securitized accounts receivable include the following at December 31 (in thousands):

	2014			2013
Gross domestic accounts receivables	$	330,466		$	107,627
Gross domestic securitized accounts receivable		675,000			349,000
Gross foreign receivables		367,173			488,140
Total gross receivables		1,372,639			944,767
Less allowance for doubtful accounts		(23,842	)		(22,416	)
Net accounts and securitized accounts receivable	$	1,348,797		$	922,351

Allowance for Doubtful Accounts Related to Accounts Receivable

A rollforward of the Company’s allowance for doubtful accounts related to accounts receivable for the years ended December 31 is as follows (in thousands):

	2014			2013			2012
Allowance for doubtful accounts beginning of year	$	22,416		$	19,463		$	15,315
Add:
Provision for bad debts		24,412			18,867			21,896
Less:
Write-offs		(22,986	)		(15,914	)		(17,748	)
Allowance for doubtful accounts end of year	$	23,842		$	22,416		$	19,463