Revenues (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 139,462	$ 197,772	$ 692,096	$ 423,189
Over-time
Disaggregation of Revenue [Line Items]
Revenues	112,329	170,283	620,447	383,135
Point in time
Disaggregation of Revenue [Line Items]
Revenues	$ 27,133	$ 27,489	$ 71,649	$ 40,054