Revenue Disaggregated Revenue by Geography (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disaggregation of Revenue [Line Items]
Revenues	$ 318,046	$ 328,607
EMEA [Member]
Disaggregation of Revenue [Line Items]
Revenues	34,800	37,928
Other foreign countries [Member]
Disaggregation of Revenue [Line Items]
Revenues	55,895	60,521
Foreign [Member]
Disaggregation of Revenue [Line Items]
Revenues	90,695	98,449
UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues	$ 227,351	$ 230,158