Revenue (Disaggregate revenue) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Disaggregation of Revenue [Line Items]
Revenue	$ 1,788,290	$ 1,584,652	$ 1,450,826
Tuition and fees
Disaggregation of Revenue [Line Items]
Revenue	1,778,417	1,571,243	1,439,082
Other
Disaggregation of Revenue [Line Items]
Revenue	9,873	13,409	11,744
Chamberlain
Disaggregation of Revenue [Line Items]
Revenue	725,774	633,522	571,034
Chamberlain | Tuition and fees
Disaggregation of Revenue [Line Items]
Revenue	725,774	633,522	571,034
Chamberlain | Other
Disaggregation of Revenue [Line Items]
Revenue	0	0	0
Walden
Disaggregation of Revenue [Line Items]
Revenue	693,430	595,332	533,725
Walden | Tuition and fees
Disaggregation of Revenue [Line Items]
Revenue	693,430	595,332	533,725
Walden | Other
Disaggregation of Revenue [Line Items]
Revenue	0	0	0
Medical and Veterinary
Disaggregation of Revenue [Line Items]
Revenue	369,086	355,798	346,067
Medical and Veterinary | Tuition and fees
Disaggregation of Revenue [Line Items]
Revenue	359,213	342,389	334,323
Medical and Veterinary | Other
Disaggregation of Revenue [Line Items]
Revenue	$ 9,873	$ 13,409	$ 11,744