Discontinued Operations and Assets Held for Sale (Summary of Income Statement Information of Operations) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Discontinued Operations And Disposal Groups [Abstract]
Revenue	$ 0	$ 41,105	$ 0	$ 153,444
Operating cost and expense:
Cost of educational services	0	6,872	0	26,846
Student services and administrative expense	3,993	30,256	6,734	123,563
Restructuring expense	0	551	0	1,500
Total operating cost and expense	3,993	37,679	6,734	151,909
(Loss) income from discontinued operations before income taxes	(3,993)	3,426	(6,734)	1,535
(Loss) gain on disposal of discontinued operations before income taxes	(402)	474,003	(3,576)	474,003
Benefit from (provision for) income taxes	1,701	(134,089)	3,222	(134,201)
(Loss) income from discontinued operations	$ (2,694)	$ 343,340	$ (7,088)	$ 341,337