Summary of Significant Accounting Policies - Revenue Recognition (Details) - USD ($) $ in Thousands	12 Months Ended				24 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2023
Summary of Significant Accounting Policies
Revenues	$ 2,040,069	$ 1,837,358	$ 1,686,666
Percentage of impact on total revenue		2.80%	1.60%	1.40%
Estimate of Percentage of Impact on Total Revenue					2.00%
School operating losses included in the entity's revenue	$ 17,000	$ 23,800	$ 36,300
Minimum
Summary of Significant Accounting Policies
Duration of contracts providing access to curriculum via the entity's Web site	1 year
Maximum
Summary of Significant Accounting Policies
Duration of contracts providing access to curriculum via the entity's Web site	2 years
Primary Obligor
Summary of Significant Accounting Policies
Revenues	$ 576,400	$ 503,200	$ 460,500