Acquisitions (Additional Information) (Detail) - USD ($) $ in Thousands			3 Months Ended		12 Months Ended
	May 31, 2019	Feb. 05, 2018	Dec. 31, 2019	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Business Acquisition [Line Items]
Payments to acquire business					$ 0	$ 118,409	$ 3,069
Cash paid for acquisition				$ 118,400
Long-term line of credit				$ 407,000	$ 294,000	$ 407,000
Proceeds from net working capital			$ 100
OnCourse Learning [Member]
Business Acquisition [Line Items]
Percentage of voting interests acquired	100.00%
Payments to acquire business	$ 118,300
Cash acquired from acquisition	1,200
Long-term line of credit	100,000
Intangible Assets	$ 63,100
Amortizable intangible assets, estimated useful lives	9 years
OnCourse Learning [Member] | Trade Name [Member]
Business Acquisition [Line Items]
Intangible assets, indefinite lived	$ 18,400
Edupristine [Member]
Business Acquisition [Line Items]
Percentage of voting interests acquired		64.00%			71.00%
Cash paid for acquisition		$ 3,200
Intangible Assets		$ 1,380
Equity method investment, ownership percentage		36.00%
Equity method investments, fair value		$ 4,100
Noncontrolling interest on acquisition date		4,100
Gain on equity investment		1,200
Edupristine [Member] | Trade Name [Member]
Business Acquisition [Line Items]
Intangible assets, indefinite lived		$ 1,400