SEGMENT REPORTING - Company's consolidated operating results including significant segment expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
NET REVENUES	$ 418,973	$ 444,538	$ 651,138
Stock-based compensation (1)	35,076	28,528	22,364
Other operating expenses, net	0	0	1,130
INCOME FROM OPERATIONS	17,929	35,059	180,412
OTHER INCOME	12,825	10,848	3,014
PROVISION (BENEFIT) FOR INCOME TAXES	(1,480)	(9,828)	12,575
NET INCOME	32,234	55,735	170,851
Other segment information
Depreciation	33,303	35,203	34,930
Single reportable segment
Segment Reporting Information [Line Items]
NET REVENUES	418,973	444,538	651,138
Stock-based compensation (1)	35,076	28,528	22,364
Amortization of acquisition-related intangible assets (2)	1,034	1,928	2,169
Cost of revenues (excluding 1 & 2)	191,098	211,962	281,171
Research and development (excluding 1)	88,203	85,128	83,466
Sales and marketing (excluding 1 & 2)	59,761	57,710	56,298
General and administrative (excluding 1)	25,872	24,223	24,128
Other operating expenses, net	0	0	1,130
INCOME FROM OPERATIONS	17,929	35,059	180,412
OTHER INCOME	12,825	10,848	3,014
PROVISION (BENEFIT) FOR INCOME TAXES	(1,480)	(9,828)	12,575
NET INCOME	32,234	55,735	170,851
Other segment information
Depreciation	33,303	35,203	34,930
Amortization of intangibles	1,279	2,173	2,415
Interest Income	$ 13,576	$ 11,655	$ 3,471