Revenue Disaggregated Revenue by Geography (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 328,607	$ 330,932
EMEA [Member]
Disaggregation of Revenue [Line Items]
Revenues	37,928	32,378
Other foreign countries [Member]
Disaggregation of Revenue [Line Items]
Revenues	60,521	51,361
Foreign [Member]
Disaggregation of Revenue [Line Items]
Revenues	98,449	83,739
UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues	$ 230,158	$ 247,193