Summary of Significant Accounting Policies - Revenue Recognition (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Summary of Significant Accounting Policies
Revenues	$ 1,837,358	$ 1,686,666	$ 1,536,760
Percentage of impact on total revenue	1.60%	1.40%	(0.10%)
School operating losses included in the entity's revenue	$ 23,800	$ 36,300	$ 63,400
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	$ 503,200	$ 460,500	$ 412,100