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SEGMENT AND GEOGRAPHICAL INFORMATION - Revenue and Assets by Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022 | Mar. 31, 2023
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | $ 466,989 | $ 489,537 | $ 882,818 | $ 908,181 |
Segment profit | 142,609 | 137,526 | 262,724 | 274,821 |
Corporate expenses | 376,712 | 400,166 | 719,194 | 741,240 |
Other (income)/expense, net | (3,296) | 5,104 | (6,301) | 6,853 |
Income before provision for income taxes | 93,573 | 84,267 | 169,925 | 160,088 |
Total assets | 2,781,553 |  | 2,781,553 |  | $ 2,968,814
Operating Segments |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Total assets | 1,353,060 |  | 1,353,060 |  | 1,377,444
Operating Segments | Corporate Finance |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 281,684 | 315,016 | 508,735 | 578,967 |
Segment profit | 90,517 | 93,794 | 152,139 | 185,359 |
Total assets | 1,006,417 |  | 1,006,417 |  | 1,015,760
Operating Segments | Financial Restructuring |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 114,670 | 97,694 | 238,038 | 176,532 |
Segment profit | 32,499 | 17,563 | 76,093 | 44,259 |
Total assets | 171,537 |  | 171,537 |  | 196,289
Operating Segments | Financial Advisory Services |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Revenues | 70,635 | 76,827 | 136,045 | 152,682 |
Segment profit | 19,593 | 26,169 | 34,492 | 45,203 |
Total assets | 175,106 |  | 175,106 |  | 165,395
Corporate, Non-Segment |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Corporate expenses | 52,332 | 48,155 | 99,100 | 107,880 |
Total assets | 1,428,493 |  | 1,428,493 |  | $ 1,591,370
Segment Reconciling Items |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Other (income)/expense, net | $ (3,296) | $ 5,104 | $ (6,301) | $ 6,853 |

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