Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2020

Revenues [Abstract]

Disaggregation of Revenue [Table Text Block]

The following table presents our revenues disaggregated by geography, based on the billing addresses of our customers:

	Year Ended December 31,
	2020		2019		2018
	(In thousands)
U.S	$	804,647	$	772,586	$	756,907
EMEA	214,204		206,975		212,699
China	113,048		119,291		106,841
Other	133,153		132,809		138,522
Total revenues	$	1,265,052	$	1,231,661	$	1,214,969