Revenue Disaggregated Revenue by Geography (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]
Revenues	$ 303,379	$ 312,282	$ 631,986	$ 643,214
EMEA [Member]
Disaggregation of Revenue [Line Items]
Revenues	28,583	32,978	66,511	65,356
Other foreign countries [Member]
Disaggregation of Revenue [Line Items]
Revenues	66,572	51,594	127,093	102,955
Foreign [Member]
Disaggregation of Revenue [Line Items]
Revenues	95,155	84,572	193,604	168,311
UNITED STATES
Disaggregation of Revenue [Line Items]
Revenues	$ 208,224	$ 227,710	$ 438,382	$ 474,903