Accounts Receivable

3 Months Ended

Mar. 31, 2014

Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]

Accounts Receivable

Accounts Receivable

Net accounts receivable consisted of the following as of March 31, 2014 and December 31, 2013 (in thousands):

	March 31, 2014			December 31, 2013
Trade accounts receivable	$	218,310		$	175,391
Unbilled accounts receivable	90,577			100,300
Gross accounts receivable	308,887			275,691
Allowance for doubtful accounts	(754		)	(708		)
Reserve for cash-basis customers	(6,179		)	(2,995		)
Total accounts receivable reserves	(6,933		)	(3,703		)
Accounts receivable, net	$	301,954		$	271,988