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SEGMENT REPORTING - Revenue, significant expenses and net income (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 USD ($) segment | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Revenue |  | $ 4,641,264 | $ 4,089,986 | $ 3,561,718
Depreciation and amortization |  | 196,935 | 145,292 | 132,088
Restructuring |  | 23,765 | 11,013 | 55
Interest income |  | (62,484) | (29,637) | (10,099)
Interest expense |  | 75,999 | 36,185 | 22,934
Provision for income taxes |  | 340,335 | 240,782 | 196,411
Net income |  | $ 1,055,484 | 1,041,144 | 848,952
Number of Operating Segments | segment |  | 1 |  |
Reportable Segment |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |
Revenue |  | $ 4,641,264 | 4,089,986 | 3,561,718
Salary, benefits and other employee-related costs |  | 1,936,542 | 1,754,223 | 1,574,910
Stock based compensation |  | 391,219 | 325,611 | 270,439
Manufacturing costs |  | 330,903 | 232,012 | 173,160
Facilities and other infrastructure costs |  | 174,102 | 156,977 | 139,150
Depreciation and amortization |  | 196,935 | 145,292 | 132,088
Professional Services |  | 153,439 | 117,752 | 117,442
Restructuring |  | 23,765 | 11,013 | 55
Other segment items | [1] | 25,025 | 58,632 | 96,276
Interest income |  | (62,484) | (29,637) | (10,099)
Interest expense |  | 75,999 | 36,185 | 22,934
Provision for income taxes |  | 340,335 | 240,782 | 196,411
Net income |  | $ 1,055,484 | $ 1,041,144 | $ 848,952
[1] | Other segment items includes direct costs for advertising, marketing events, travel, entertainment, bad debt and other operating expense categories that are not considered significant individually. It also includes non-operating expenses such as gains and losses on investments, foreign currency and other non-operating expenses that are not considered significant individually.

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