Segment and Geographic Reporting - Geographical Information of Revenue (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenues	$ 746,290	$ 627,041	$ 666,331	$ 340,409	$ 362,728	$ 342,496	$ 342,839	$ 314,433	$ 2,380,071	$ 1,362,496	$ 1,158,794
United States
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenues									1,432,492	405,404	373,735
Total Non-United States
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenues									947,579	957,092	785,059
Hong Kong
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenues									299,359	319,601	186,978
China
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenues									292,138	290,287	253,672
Japan
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenues									146,325	109,670	89,153
Germany
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenues									124,934	155,000	132,161
Switzerland
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenues									35,895	32,770	49,557
Vietnam
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenues									22,152	22,322	26,898
Korea
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenues									8,537	11,674	9,757
Singapore
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenues									5,791	6,868	5,941
Philippines
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenues									4,479	4,179	3,909
United Kingdom
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenues									4,226	2,712	9,359
Taiwan
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenues									3,743	2,005	1,705
Belgium
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenues									0	4	4,511
Italy
Revenues From External Customers And Long Lived Assets [Line Items]
Net revenues									$ 0	$ 0	$ 11,458