Income Taxes - Schedule of Changes in Liability for Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 11,520	$ 9,892	$ 7,577
Increases in current year tax positions	1,506	191	2,536
Increases in prior year tax positions	0	376	224
Decreases in prior year tax positions	0	0	(9)
Acquired business	31,791	6,036	0
Expiration of statute of limitations	(2,014)	(4,975)	(436)
Ending balance	$ 42,803	$ 11,520	$ 9,892