Schedule of Reconciliation of Income Tax Expense at Statutory Federal Rate to Reported Income Tax Expense (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Taxes at statutory rate, amount									$ 41,576	$ 31,484	$ 27,689
State income taxes-net of federal benefit, amount									(641)	864	(196)
Taxes on non U.S. earnings, amount									(12,907)	(13,860)	(11,687)
Valuation allowance, amount									(806)	8,464	678
Research and manufacturing incentive deductions, amount									(3,346)	(3,074)	(2,573)
Other, amount									(362)	591	(774)
Total Income Tax Expense	$ 1,211	$ 6,837	$ 7,913	$ 7,553	$ 13,934	$ 2,426	$ 3,187	$ 4,922	$ 23,514	$ 24,469	$ 13,137
Taxes at statutory rate									35.00%	35.00%	35.00%
State income taxes-net of federal benefit, rate										1.00%
Taxes on non U.S. earnings, rate									(11.00%)	(15.00%)	(15.00%)
Valuation allowance, rate									(1.00%)	9.00%	1.00%
Research and manufacturing incentive deductions, rate									(3.00%)	(3.00%)	(3.00%)
Other, rate											(1.00%)
Total Effective Income Tax, rate									20.00%	27.00%	17.00%