SEGMENT INFORMATION - Revenue and Long-Lived Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Revenue and Long-lived Assets by Geography
Revenue	$ 515,782	$ 420,988	$ 951,941	$ 808,017
Long-lived assets (excluding goodwill and intangible assets)	156,230		156,230		$ 118,267
United States
Revenue and Long-lived Assets by Geography
Revenue	490,049	394,538	895,557	750,982
Long-lived assets (excluding goodwill and intangible assets)	149,232		149,232		111,136
All other countries
Revenue and Long-lived Assets by Geography
Revenue	25,733	$ 26,450	56,384	$ 57,035
Long-lived assets (excluding goodwill and intangible assets)	$ 6,998		$ 6,998		$ 7,131