Revenue (Disaggregate revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Mar. 31, 2025	Mar. 31, 2024
Disaggregation of Revenue [Line Items]
Revenue	$ 466,055	$ 412,658	$ 1,331,184	$ 1,174,745
Tuition and fees
Disaggregation of Revenue [Line Items]
Revenue	463,607	409,216	1,323,350	1,164,376
Other
Disaggregation of Revenue [Line Items]
Revenue	2,448	3,442	7,834	10,369
Chamberlain
Disaggregation of Revenue [Line Items]
Revenue	192,592	170,338	541,508	466,487
Chamberlain | Tuition and fees
Disaggregation of Revenue [Line Items]
Revenue	192,592	170,338	541,508	466,487
Chamberlain | Other
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Walden
Disaggregation of Revenue [Line Items]
Revenue	178,418	150,607	511,237	439,023
Walden | Tuition and fees
Disaggregation of Revenue [Line Items]
Revenue	178,418	150,607	511,237	439,023
Walden | Other
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Medical and Veterinary
Disaggregation of Revenue [Line Items]
Revenue	95,045	91,713	278,439	269,235
Medical and Veterinary | Tuition and fees
Disaggregation of Revenue [Line Items]
Revenue	92,597	88,271	270,605	258,866
Medical and Veterinary | Other
Disaggregation of Revenue [Line Items]
Revenue	$ 2,448	$ 3,442	$ 7,834	$ 10,369