Income Taxes (Consolidated Effective Income Tax Rate Differed From The U.S. Federal Statutory Income Tax Rate) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Income Tax Expense (Benefit), Continuing Operations [Abstract]
Income tax expense computed at the federal statutory rate	$ 70,081	$ 65,751	$ 46,602
Income tax expense computed at the federal statutory rate, percentage	35.00%	35.00%	35.00%
State income taxes, net of federal benefit	$ 5,081	$ 5,419	$ 1,914
State income taxes, net of federal benefit, percentage	2.50%	2.90%	1.40%
Foreign rate differential	$ (4,350)	$ (4,857)	$ (7,960)
Foreign rate differential, percentage	(2.20%)	(2.60%)	(6.00%)
Change in valuation allowances	$ (796)	$ (491)	$ (4,708)
Change in valuation allowances, percentage	(0.40%)	(0.30%)	(3.50%)
Change in reserves	$ (2,066)	$ (5,193)	$ 394
Change in reserves, percentage	(1.00%)	(2.80%)	0.30%
Research and development	$ (13,376)	$ (3,284)	$ (2,986)
Research and development, percentage	(6.70%)	(1.70%)	(2.20%)
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Amount	$ (1,805)	$ (376)	$ 0
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent	(0.90%)	(0.20%)	0.00%
Other non-deductible expenses	$ 0	$ 0	$ 968
Other non-deductible expenses, percentage	0.00%	0.00%	0.70%
Statutory tax rate changes	$ (576)	$ (623)	$ 798
Statutory tax rate changes, percentage	(0.20%)	(0.30%)	0.60%
Other, net	$ 216	$ 2,421	$ 2,156
Other, net, percentage	0.10%	1.30%	1.60%
Provision for income taxes	$ 52,409	$ 58,767	$ 37,178
Consolidated effective income tax rate, percentage	26.20%	31.30%	27.90%