Current report of foreign issuer pursuant to Rules 13a-16 and 15d-16 Amendments

Revenues (Schedule of Disaggregation of Revenues Based on Time) (Details)

v3.20.2
Revenues (Schedule of Disaggregation of Revenues Based on Time) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Disaggregation of Revenue [Line Items]        
Total Revenues $ 117,623 $ 163,163 $ 250,530 $ 318,463
Revenues recognized in point in time [Member]        
Disaggregation of Revenue [Line Items]        
Total Revenues 82,655 121,088 176,471 236,806
Revenues recognized over time [Member]        
Disaggregation of Revenue [Line Items]        
Total Revenues 34,968 42,075 74,059 81,657
Products [Member]        
Disaggregation of Revenue [Line Items]        
Total Revenues 73,877 110,341 157,049 215,432
Products [Member] | Revenues recognized in point in time [Member]        
Disaggregation of Revenue [Line Items]        
Total Revenues 73,877 110,341 157,049 215,432
Services [Member]        
Disaggregation of Revenue [Line Items]        
Total Revenues 43,746 52,822 93,481 103,031
Services [Member] | Revenues recognized in point in time [Member]        
Disaggregation of Revenue [Line Items]        
Total Revenues 8,778 10,747 19,422 21,374
Services [Member] | Revenues recognized over time [Member]        
Disaggregation of Revenue [Line Items]        
Total Revenues $ 34,968 $ 42,075 $ 74,059 $ 81,657