Remaining Annual Principal Payments of Credit Facilities and Note Payable (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Jun. 30, 2016
Line Of Credit Facility [Line Items]
Year 1	$ 20,000
Year 2	23,834
Year 3	20,000
Year 4	22,679
Year 5	257,000
Total debt	343,513	$ 235,917
Term Loans
Line Of Credit Facility [Line Items]
Year 1	20,000
Year 2	20,000
Year 3	20,000
Year 4	20,000
Year 5	5,000
Total debt	85,000	45,000
Yen Line of Credit
Line Of Credit Facility [Line Items]
Year 4	2,679
Total debt	2,679	2,917
U.S. Dollar Line of Credit
Line Of Credit Facility [Line Items]
Year 5	252,000
Total debt	252,000	$ 188,000
Note Payable
Line Of Credit Facility [Line Items]
Year 2	3,834
Total debt	$ 3,834