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Summary of Significant Accounting Policies - Disaggregated Revenues (Details) $ in Thousands | 12 Months Ended
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Jun. 30, 2026 USD ($) item | Jun. 30, 2025 USD ($) | Jun. 30, 2024 USD ($)
Summary of Significant Accounting Policies |  |  |
Number of lines of revenue | item | 2 |  |
Total Revenues | $ 2,518,081 | $ 2,405,317 | $ 2,040,069
General Education |  |  |
Summary of Significant Accounting Policies |  |  |
Percentage of revenues from funding-based contracts | 96.00% | 95.00% | 93.00%
Total Revenues | $ 1,417,785 | $ 1,448,676 | $ 1,289,193
Career Learning |  |  |
Summary of Significant Accounting Policies |  |  |
Total Revenues | $ 1,100,296 | $ 956,641 | $ 750,876
Middle - High School |  |  |
Summary of Significant Accounting Policies |  |  |
Percentage of revenues from funding-based contracts | 100.00% | 100.00% | 100.00%
Total Revenues | $ 1,043,726 | $ 876,287 | $ 651,191
Adult |  |  |
Summary of Significant Accounting Policies |  |  |
Total Revenues | $ 56,570 | $ 80,354 | $ 99,685

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