Accounts Receivable, Net

3 Months Ended

Mar. 31, 2016

Receivables [Abstract]

Accounts Receivable, Net

2. Accounts Receivable, Net

Accounts receivable, net balances at March 31, 2016 and December 31, 2015 were as follows (in thousands):

	March 31, 2016			December 31, 2015
Trade accounts receivable	$	128,894		$	118,916
Unbilled revenue		81,243			47,351
Total accounts receivable		210,137			166,267
Allowance for doubtful accounts		(12,889	)		(12,659	)
Accounts receivable, net	$	197,248		$	153,608