XML 44 R33.htm IDEA: XBRL DOCUMENT v3.5.0.2
Allowance for Doubtful Accounts and Unbilled Services - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Receivables [Abstract]        
Provision for doubtful accounts $ 1,600 $ 3,800 $ 5,903 $ 10,364