Quarterly report pursuant to Section 13 or 15(d)

Revenue - Allowance for Doubtful Accounts (Details)

v3.8.0.1
Revenue - Allowance for Doubtful Accounts (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Allowance for Doubtful Accounts Receivable [Roll Forward]    
Beginning balance $ 8,680 $ 10,091
(Recovery) additions charged to statements of operations (326) 595
Less: Bad debt write offs (2,430) (426)
Ending balance $ 5,924 $ 10,260