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Segment Information (Tabulation of Business Segment Information Based on Current Segmentation) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2023 | Dec. 31, 2023 | Dec. 31, 2022 | Mar. 31, 2024 | Mar. 31, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2022
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total Consolidated Revenue |  |  |  |  |  | $ 1,584,652 | $ 1,450,826 | $ 1,381,842
Total consolidated adjusted operating income |  |  |  |  |  | 308,778 | 287,570 | 267,602
Deferred revenue adjustment |  |  |  |  |  |  |  | (8,561)
CEO transition costs |  |  |  |  |  |  |  | (6,195)
Restructuring expense |  |  |  |  |  | (1,870) | (18,817) | (25,628)
Business acquisition and integration expense |  |  |  |  |  | (34,215) | (42,661) | (53,198)
Litigation reserve |  |  |  |  |  | 18,500 | 10,000 |
Loss on assets held for sale |  |  |  |  |  | (647) | 0 | 0
Debt modification costs |  |  |  |  |  | (848) |  |
Gain on sale of assets |  |  |  |  |  | 0 | 13,317 | 0
Total consolidated operating income |  |  |  |  |  | 217,054 | 168,170 | 76,746
Interest expense |  |  |  |  |  | (63,659) | (63,100) | (129,348)
Other income, net |  |  |  |  |  | 10,542 | 6,965 | 1,108
Total consolidated income from continuing operations before income taxes |  |  |  |  |  | 163,937 | 112,035 | (51,494)
Total Consolidated capital expenditures |  |  |  |  |  | 48,893 | 26,014 | 31,054
Total consolidated depreciation expense | $ 9,338 | $ 19,381 | $ 21,427 | $ 29,879 | $ 31,506 | 39,676 | 41,376 | 44,574
Total consolidated intangible amortization expense |  |  |  |  |  | (35,644) | (61,239) | (97,274)
Chamberlain |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total Consolidated Revenue |  |  |  |  |  | 633,522 | 571,034 | 557,536
Walden University |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total Consolidated Revenue |  |  |  |  |  | 595,332 | 533,725 | 485,393
Medical and Veterinary |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total Consolidated Revenue |  |  |  |  |  | 355,798 | 346,067 | 338,913
Operating Segments [Member] | Chamberlain |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total Consolidated Revenue |  |  |  |  |  | 633,522 | 571,034 | 557,536
Total consolidated adjusted operating income |  |  |  |  |  | 137,800 | 135,503 | 127,252
Total Consolidated capital expenditures |  |  |  |  |  | 26,293 | 13,934 | 15,235
Total consolidated depreciation expense |  |  |  |  |  | 18,752 | 17,175 | 18,547
Operating Segments [Member] | Walden University |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total Consolidated Revenue |  |  |  |  |  | 595,332 | 533,725 | 485,393
Total consolidated adjusted operating income |  |  |  |  |  | 130,547 | 110,364 | 104,582
Total Consolidated capital expenditures |  |  |  |  |  | 5,889 | 1,084 | 5,393
Total consolidated depreciation expense |  |  |  |  |  | 7,389 | 9,419 | 9,255
Total consolidated intangible amortization expense |  |  |  |  |  | (35,644) | (61,239) | (97,274)
Operating Segments [Member] | Medical and Veterinary |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total Consolidated Revenue |  |  |  |  |  | 355,798 | 346,067 | 338,913
Total consolidated adjusted operating income |  |  |  |  |  | 71,507 | 67,336 | 69,148
Restructuring expense |  |  |  |  |  | (442) | (7,687) | (9,791)
Total Consolidated capital expenditures |  |  |  |  |  | 5,708 | 3,358 | 3,277
Total consolidated depreciation expense |  |  |  |  |  | 11,983 | 12,438 | 13,890
Corporate, Non-Segment [Member] |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Total consolidated adjusted operating income |  |  |  |  |  | (31,076) | (25,633) | (33,380)
Total Consolidated capital expenditures |  |  |  |  |  | 11,003 | 7,638 | 7,149
Total consolidated depreciation expense |  |  |  |  |  | $ 1,552 | $ 2,344 | $ 2,882

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