Remaining Annual Principal Payments of Credit Obligations (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Jun. 30, 2018
Line Of Credit Facility [Line Items]
Year 1	$ 23,834
Year 2	22,708
Year 3	165,000
Year 4	345,000
Total	556,542
Term Loans
Line Of Credit Facility [Line Items]
Year 1	20,000
Year 2	20,000
Year 3	10,000
Total	50,000	$ 65,000
Yen Line of Credit
Line Of Credit Facility [Line Items]
Year 2	2,708
Total	2,708	2,714
U.S. Dollar Line of Credit
Line Of Credit Facility [Line Items]
Year 3	155,000
Total	155,000	$ 80,000
Note Payable
Line Of Credit Facility [Line Items]
Year 1	3,834
Total	3,834
Convertible Notes
Line Of Credit Facility [Line Items]
Year 4	345,000
Total	$ 345,000