Discontinued Operations and Assets Held for Sale (Summary of Income Statement Information of Operations) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Discontinued Operations And Disposal Groups [Abstract]
Revenue	$ 0	$ 55,153	$ 0	$ 100,805
Operating cost and expense:
Cost of educational services	0	35,717	0	69,665
Student services and administrative expense	11,187	15,706	21,271	30,079
Restructuring expense	0	391	0	426
Total operating cost and expense	11,187	51,814	21,271	100,170
Operating (loss) income	(11,187)	3,339	(21,271)	635
Interest and dividend income	0	761	0	1,739
Interest expense	0	(806)	0	(1,963)
Net other expense	0	(45)	0	(224)
(Loss) income from discontinued operations before income taxes	(11,187)	3,294	(21,271)	411
Benefit from income taxes	2,748	823	5,225	550
Net (loss) income from discontinued operations	$ (8,439)	$ 4,117	$ (16,046)	$ 961