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SEGMENT AND GEOGRAPHICAL INFORMATION - Revenue and Assets by Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2023 | Dec. 31, 2022 | Mar. 31, 2023
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | $ 511,130 | $ 456,499 | $ 1,393,948 | $ 1,364,680 |
Segment profit | 150,870 | 136,354 | 413,594 | 411,175 |
Corporate expenses | 414,590 | 372,326 | 1,133,784 | 1,113,566 |
Other (income)/expense, net | (6,035) | 563 | (12,336) | 7,416 |
Income before provision for income taxes | 102,575 | 83,610 | 272,500 | 243,698 |
Total assets | 2,958,908 |  | 2,958,908 |  | $ 2,968,814
Operating Segments |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total assets | 1,446,659 |  | 1,446,659 |  | 1,377,444
Operating Segments | Corporate Finance |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 310,512 | 291,734 | 819,247 | 870,701 |
Segment profit | 93,254 | 83,753 | 245,393 | 269,112 |
Total assets | 1,085,331 |  | 1,085,331 |  | 1,015,760
Operating Segments | Financial Restructuring |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 128,565 | 98,819 | 366,603 | 275,351 |
Segment profit | 43,284 | 40,244 | 119,377 | 84,503 |
Total assets | 182,302 |  | 182,302 |  | 196,289
Operating Segments | Financial Advisory Services |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 72,053 | 65,946 | 208,098 | 218,628 |
Segment profit | 14,332 | 12,357 | 48,824 | 57,560 |
Total assets | 179,026 |  | 179,026 |  | 165,395
Corporate, Non-Segment |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Corporate expenses | 54,330 | 52,181 | 153,430 | 160,061 |
Total assets | 1,512,249 |  | 1,512,249 |  | $ 1,591,370
Segment Reconciling Items |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Other (income)/expense, net | $ (6,035) | $ 563 | $ (12,336) | $ 7,416 |

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