XML 34 R23.htm IDEA: XBRL DOCUMENT v3.7.0.1
Accounts Receivable (Tables)
 6 Months Ended
Jun. 30, 2017
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]  
Schedule of Accounts Receivable
Net accounts receivable consisted of the following as of June 30, 2017 and December 31, 2016 (in thousands):
 
 
June 30,
2017
 
December 31,
2016
Trade accounts receivable
$
282,372

 
$
260,976

Unbilled accounts receivable
114,882

 
113,765

Gross accounts receivable
397,254

 
374,741

Allowance for doubtful accounts
(994
)
 
(829
)
Reserve for cash-basis customers
(395
)
 
(5,316
)
Total accounts receivable reserves
(1,389
)
 
(6,145
)
Accounts receivable, net
$
395,865

 
$
368,596