Annual report pursuant to Section 13 and 15(d)

Revenues and Cost of Revenues (Cost of Revenues) (Details)

v3.20.4
Revenues and Cost of Revenues (Cost of Revenues) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disaggregation of Revenue [Line Items]      
Cost of revenues $ 305,929 $ 278,811 $ 263,400
Asset-based      
Disaggregation of Revenue [Line Items]      
Cost of revenues 278,569 243,913 232,145
Subscription-based      
Disaggregation of Revenue [Line Items]      
Cost of revenues 26,934 28,904 25,192
Professional services and other revenues      
Disaggregation of Revenue [Line Items]      
Cost of revenues $ 426 $ 5,994 $ 6,063