Revenue (Tables)

9 Months Ended

Sep. 30, 2021

Revenue Recognition [Abstract]

Disaggregation of Revenue [Table Text Block]

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

	Three Months Ended September 30,				Nine Months Ended  September 30,
	2021		2020		2021		2020
	(In thousands)
U.S.	$	214,352	$	202,934	$	632,424	$	599,845
EMEA	58,615		54,034		172,717		159,103
China	24,607		27,463		74,974		86,676
Other	36,668		33,448		107,153		99,144
Total revenues	$	334,242	$	317,879	$	987,268	$	944,768