Finance and Operating Leases - Lease cost and other information (Details) - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Finance lease cost:
Amortization of right-of-use assets	$ 7,072	$ 8,842
Interest on lease liabilities	778	517
Total lease cost	11,163	13,930
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows from operating leases	(3,259)	(3,619)
Financing cash flows from finance leases	(8,747)	(11,721)
Right-of-use assets obtained in exchange for new finance lease liabilities	40,839	17,843
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 282	$ 625
Weighted-average remaining lease term - finance leases	1 year 11 months 15 days	1 year 8 months 4 days
Weighted-average remaining lease term - operating leases	5 years 6 months 3 days	5 years 11 months 15 days
Weighted-average discount rate - finance leases	5.81%	4.67%
Weighted-average discount rate - operating leases	2.93%	2.84%
Instructional costs and services
Finance lease cost:
Operating lease cost	$ 2,340	$ 2,558
Short-term lease cost	13	13
Sublease income	(66)	(132)
Selling, general and administrative expenses
Finance lease cost:
Operating lease cost	1,126	2,199
Short-term lease cost	23	56
Sublease income	$ (123)	$ (123)