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Property and Equipment, Net (Additional Information) (Details) - USD ($) $ in Thousands			3 Months Ended			6 Months Ended
	Sep. 27, 2019	Jul. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Jun. 30, 2020
Real Estate [Line Items]
Depreciation expense			$ 9,350	$ 8,831		$ 18,325	$ 17,224
Property and equipment, net			290,236	281,975		290,236	281,975	$ 286,102
Proceeds From Down Payment On Seller Loan						0	5,200
Notes receivable				60,494			60,494
Financing payables				16,186			16,186
Proceeds from Sales of Assets, Investing Activities						0	6,421
Realized Gain on Sale of Assets			$ 0	$ 0		$ 0	$ 4,779
Discontinued Operations, Disposed of by Sale \| Chicago, Illinois Campus [Member]
Real Estate [Line Items]
Proceeds from disposal		$ 52,000
Proceeds From Down Payment On Seller Loan		5,200			$ 5,200
Receivable with Imputed Interest, Face Amount		$ 46,800
Receivable with Imputed Interest, Effective Yield (Interest Rate)		4.00%
Discontinued Operations, Disposed of by Sale \| Chicago, Illinois Campus [Member] \| Other Noncurrent Assets [Member]
Real Estate [Line Items]
Notes receivable		$ 40,300
Discontinued Operations, Disposed of by Sale \| Chicago, Illinois Campus [Member] \| Other Liabilities
Real Estate [Line Items]
Financing payables		$ 45,500
Discontinued Operations, Disposed of by Sale \| Columbus, Ohio Campus
Real Estate [Line Items]
Proceeds from Sales of Assets, Investing Activities	$ 6,400
Discontinued Operations, Held-for-sale [Member] \| Columbus, Ohio Campus
Real Estate [Line Items]
Realized Gain on Sale of Assets	$ 4,800