Revenue (Disaggregate revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Revenue	$ 363,302	$ 371,198	$ 717,861	$ 660,268
Tuition and fees
Disaggregation of Revenue [Line Items]
Revenue	360,533	368,248	712,353	654,979
Other
Disaggregation of Revenue [Line Items]
Revenue	2,769	2,950	5,508	5,289
Chamberlain
Disaggregation of Revenue [Line Items]
Revenue	141,396	139,121	276,801	274,760
Chamberlain | Tuition and fees
Disaggregation of Revenue [Line Items]
Revenue	141,396	139,121	276,801	274,760
Chamberlain | Other
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Walden University
Disaggregation of Revenue [Line Items]
Revenue	131,940	140,627	262,841	209,244
Walden University | Tuition and fees
Disaggregation of Revenue [Line Items]
Revenue	131,940	140,627	262,841	209,244
Walden University | Other
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Medical and Veterinary
Disaggregation of Revenue [Line Items]
Revenue	89,966	91,450	178,219	176,264
Medical and Veterinary | Tuition and fees
Disaggregation of Revenue [Line Items]
Revenue	87,197	88,500	172,711	170,975
Medical and Veterinary | Other
Disaggregation of Revenue [Line Items]
Revenue	$ 2,769	$ 2,950	$ 5,508	$ 5,289