Summary of Significant Accounting Policies (Effect of Revision on Affected Line Items Within Consolidated Statements of Income) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenue	$ 369,082	$ 364,281	$ 1,086,185	$ 1,021,195
Student services and administrative expense	144,526	148,863	432,713	433,379
Total operating cost and expense	309,653	331,332	957,572	990,412
Operating (loss) income	59,429	32,949	128,613	30,783
Other income (expense), net	3,980	(327)	3,301	2,435
Loss from continuing operations before income taxes	48,952	(3,963)	84,108	(76,689)
Benefit from income taxes	(389)	8,363	(5,906)	39,597
Loss from continuing operations	48,563	4,400	78,202	(37,092)
Income from discontinued operations before income taxes	(3,993)	3,426	(6,734)	1,535
Income from discontinued operations	(2,694)	343,340	(7,088)	341,337
Net income	$ 45,869	$ 347,740	$ 71,114	$ 304,245
Basic:
Continuing operations	$ 1.08	$ 0.09	$ 1.73	$ (0.75)
Discontinued operations	(0.06)	7.02	(0.16)	6.90
Total basic earnings per share	1.02	7.11	1.57	6.15
Diluted:
Continuing operations	1.06	0.09	1.70	(0.75)
Discontinued operations	(0.06)	6.95	(0.15)	6.90
Total diluted earnings per share	$ 1.00	$ 7.04	$ 1.54	$ 6.15
Previously Reported [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenue		$ 365,623		$ 1,025,891
Student services and administrative expense		149,890		432,923
Total operating cost and expense		332,359		989,956
Operating (loss) income		33,264		35,935
Other income (expense), net		1,045		2,784
Loss from continuing operations before income taxes		(2,276)		(71,188)
Benefit from income taxes		8,133		38,897
Loss from continuing operations		5,857		(32,291)
Income from discontinued operations before income taxes		4,071		2,180
Income from discontinued operations		343,985		341,982
Net income		$ 349,842		$ 309,691
Basic:
Continuing operations		$ 0.12		$ (0.65)
Discontinued operations		7.03		6.91
Total basic earnings per share		7.15		6.26
Diluted:
Continuing operations		0.12		(0.65)
Discontinued operations		6.97		6.91
Total diluted earnings per share		$ 7.09		$ 6.26
Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenue		$ (1,342)		$ (4,696)
Student services and administrative expense		(1,027)		456
Total operating cost and expense		(1,027)		456
Operating (loss) income		(315)		(5,152)
Other income (expense), net		(1,372)		(349)
Loss from continuing operations before income taxes		(1,687)		(5,501)
Benefit from income taxes		230		700
Loss from continuing operations		(1,457)		(4,801)
Income from discontinued operations before income taxes		(645)		(645)
Income from discontinued operations		(645)		(645)
Net income		$ (2,102)		$ (5,446)
Basic:
Continuing operations		$ (0.03)		$ (0.10)
Discontinued operations		(0.01)		(0.01)
Total basic earnings per share		(0.04)		(0.11)
Diluted:
Continuing operations		(0.03)		(0.10)
Discontinued operations		(0.02)		(0.01)
Total diluted earnings per share		$ (0.05)		$ (0.11)