GOODWILL AND INTANGIBLE ASSETS - Schedule of Intangible Assets with Definite Lives (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Intangible assets with definite lives
Cost	$ 172,500	$ 202,800
Accumulated Amortization	(104,795)	(127,179)
Total intangible assets with definite lives, net	67,705	75,621
Technology
Intangible assets with definite lives
Cost	83,500	87,700
Accumulated Amortization	(70,236)	(69,369)
Total intangible assets with definite lives, net	13,264	18,331
Customer lists
Intangible assets with definite lives
Cost	77,300	77,300
Accumulated Amortization	(26,195)	(24,668)
Total intangible assets with definite lives, net	51,105	52,632
Trademarks and tradenames
Intangible assets with definite lives
Cost	11,700	11,700
Accumulated Amortization	(8,364)	(7,767)
Total intangible assets with definite lives, net	$ 3,336	3,933
Website content
Intangible assets with definite lives
Cost		26,100
Accumulated Amortization		(25,375)
Total intangible assets with definite lives, net		$ 725