Revenue (Disaggregate revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Revenue	$ 412,658	$ 369,082	$ 1,174,745	$ 1,086,185
Tuition and fees
Disaggregation of Revenue [Line Items]
Revenue	409,216	365,970	1,164,376	1,077,565
Other
Disaggregation of Revenue [Line Items]
Revenue	3,442	3,112	10,369	8,620
Chamberlain
Disaggregation of Revenue [Line Items]
Revenue	170,338	149,737	466,487	426,538
Chamberlain | Tuition and fees
Disaggregation of Revenue [Line Items]
Revenue	170,338	149,737	466,487	426,538
Chamberlain | Other
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Walden
Disaggregation of Revenue [Line Items]
Revenue	150,607	132,874	439,023	395,715
Walden | Tuition and fees
Disaggregation of Revenue [Line Items]
Revenue	150,607	132,874	439,023	395,715
Walden | Other
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Medical and Veterinary
Disaggregation of Revenue [Line Items]
Revenue	91,713	86,471	269,235	263,932
Medical and Veterinary | Tuition and fees
Disaggregation of Revenue [Line Items]
Revenue	88,271	83,359	258,866	255,312
Medical and Veterinary | Other
Disaggregation of Revenue [Line Items]
Revenue	$ 3,442	$ 3,112	$ 10,369	$ 8,620