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Revenue (Disaggregate revenue) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Revenue	$ 393,242	$ 362,834	$ 762,087	$ 717,103
Tuition and fees
Disaggregation of Revenue [Line Items]
Revenue	389,799	360,065	755,160	711,595
Other
Disaggregation of Revenue [Line Items]
Revenue	3,443	2,769	6,927	5,508
Chamberlain
Disaggregation of Revenue [Line Items]
Revenue	153,553	141,396	296,149	276,801
Chamberlain | Tuition and fees
Disaggregation of Revenue [Line Items]
Revenue	153,553	141,396	296,149	276,801
Chamberlain | Other
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Walden
Disaggregation of Revenue [Line Items]
Revenue	146,808	131,940	288,416	262,841
Walden | Tuition and fees
Disaggregation of Revenue [Line Items]
Revenue	146,808	131,940	288,416	262,841
Walden | Other
Disaggregation of Revenue [Line Items]
Revenue	0	0	0	0
Medical and Veterinary
Disaggregation of Revenue [Line Items]
Revenue	92,881	89,498	177,522	177,461
Medical and Veterinary | Tuition and fees
Disaggregation of Revenue [Line Items]
Revenue	89,438	86,729	170,595	171,953
Medical and Veterinary | Other
Disaggregation of Revenue [Line Items]
Revenue	$ 3,443	$ 2,769	$ 6,927	$ 5,508

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