Summary of Significant Accounting Policies - Disaggregation of revenue (Details) $ in Thousands	12 Months Ended
	Jun. 30, 2024 USD ($) item	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)
Summary of Significant Accounting Policies
Number of lines of business | item	2
Total Revenues	$ 2,040,069	$ 1,837,358	$ 1,686,666
General Education
Summary of Significant Accounting Policies
Percentage of revenues from funding-based contracts	93.00%	90.00%	89.00%
Total Revenues	$ 1,289,193	$ 1,131,391	$ 1,273,783
Career Learning
Summary of Significant Accounting Policies
Total Revenues	$ 750,876	$ 705,967	$ 412,883
Middle - High School
Summary of Significant Accounting Policies
Percentage of revenues from funding-based contracts	100.00%	99.00%	99.00%
Total Revenues	$ 651,191	$ 586,770	$ 321,416
Adult
Summary of Significant Accounting Policies
Total Revenues	$ 99,685	$ 119,197	$ 91,467