Income Taxes - Schedule of Tax Provisions and Analysis of Effective Income Tax Rates (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Income Tax Rate Reconciliation [Line Items]
Provision for Federal income taxes before credits at statutory rate	$ 185,678	$ 156,199	$ 107,588
State income taxes	4,376	1,655	4,284
Difference between Federal statutory rate and foreign effective rate	(33,420)	(34,940)	(28,610)
Foreign exchange (losses) gains	(61)	(6,665)	2,097
Non-deductible expenses and other taxable permanent differences	10,085	9,899	7,214
Non-taxable income and other deductible permanent differences	(20,570)	(25,130)	(24,912)
Change in valuation allowance	(398)	16,777	(1,263)
Change in uncertain tax positions	5,003	11,420	9,189
Difference between Federal and financial tax accounting for equity compensation	2,310	(486)	(794)
Federal income credits	(15,448)	(3,958)	(5,053)
Other	5,925	(9,149)	2,450
Income tax expense, net	168,057	103,269	72,610
U.S. [Member]
Income Tax Rate Reconciliation [Line Items]
Foreign exchange (losses) gains	25,409	(11,561)	3,683
Tax benefit from U.S. production activities	$ (832)	$ (792)	$ (3,263)