Leases - Summary of Lease Balances (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Jun. 30, 2020
Leases [Abstract]
Operating lease right-of-use assets	$ 381,484	$ 330,767
Operating lease liabilities, current	52,489	67,549
Operating lease liabilities, noncurrent	377,742	309,680
Operating lease liabilities	$ 430,231	$ 377,229