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GOODWILL AND OTHER INTANGIBLE ASSETS - Additional information (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Dec. 31, 2022 | Oct. 18, 2022
Goodwill [Line Items] |  |  |  |  |  |
Goodwill | $ 497,388 |  | $ 497,388 |  | $ 512,595 |
Other |  |  | 422 |  |  |
Amortization expense | 10,228 | $ 9,390 | 30,804 | $ 23,146 |  |
Estimated future amortization expense remainder of fiscal year | 9,139 |  | 9,139 |  |  |
Estimated future amortization expense year one | 33,142 |  | 33,142 |  |  |
Estimated future amortization expense year two | 29,511 |  | 29,511 |  |  |
Estimated future amortization expense year three | 26,384 |  | 26,384 |  |  |
Estimated future amortization expense year four | 24,018 |  | 24,018 |  |  |
Estimated future amortization expense after year four | 59,171 |  | 59,171 |  |  |
Goodwill, fair value disclosure | 51,921 |  | 51,921 |  |  |
Tradename, fair value disclosure | $ 27,000 |  | $ 27,000 |  |  |
Fair value measurement, growth rate | 3.00% |  | 3.00% |  |  |
Fair value measurement, discount rate | 18.00% |  | 18.00% |  |  |
Fair value measurement, royalty rate | 2.00% |  | 2.00% |  |  |
Indefinite-Lived Intangible Assets |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Asset impairment charges | $ 8,000 |  |  |  |  |
Goodwill |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Asset impairment charges | 27,500 |  |  |  |  |
Series of Individually Immaterial Business Acquisitions |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Goodwill | 151,253 |  | $ 151,253 |  | 151,925 |
Working capital adjustments |  |  | 672 |  |  |
Targus |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Goodwill |  |  |  |  |  | $ 79,421
Goodwill, period change |  |  | 3,668 |  |  |
Operating Segments | Financial Consulting Segment |  |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |  |
Goodwill | $ 33,132 |  | 33,132 |  | $ 23,680 |
Other |  |  | $ 9 |  |  |

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