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, 2017	Jun. 30, 2016	Jun. 30, 2015
Accelerated Share Repurchases [Line Items]
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Percent	0.50%	0.10%	(0.20%)
Income tax expense computed at the federal statutory rate	$ 54,700	$ 75,300	$ 70,100
Income tax expense computed at the federal statutory rate, percentage	35.00%	35.00%	35.00%
State income taxes, net of federal benefit	$ (800)	$ 4,300	$ 5,100
State income taxes, net of federal benefit, percentage	(0.50%)	2.00%	2.50%
Foreign rate differential	$ (13,800)	$ (12,800)	$ (4,300)
Foreign rate differential, percentage	(8.90%)	(5.90%)	(2.20%)
Change in valuation allowances	$ (12,100)	$ 13,300	$ (800)
Change in valuation allowances, percentage	(7.70%)	6.20%	(0.40%)
Change in reserves	$ 1,500	$ (5,700)	$ (2,100)
Change in reserves, percentage	1.00%	(2.70%)	(1.00%)
Research and development	$ (600)	$ (9,000)	$ (13,400)
Research and development, percentage	(0.40%)	(4.20%)	(6.70%)
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Amount	$ 0	$ 2,800	$ (1,800)
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent	0.00%	1.30%	(0.90%)
Non-deductible losses	$ 11,100	$ (12,900)	$ 0
Non-deductible losses, percentage	7.10%	(6.00%)	0.00%
Other non-deductible expenses, Percentage	1.80%	0.70%	0.60%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Amount	$ (4,800)	$ 0	$ 0
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Compensation Cost, Percent	(3.10%)	0.00%	0.00%
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount	$ 800	$ 200	$ (600)
Other non-deductible expenses	2,800	1,500	1,300
Statutory tax rate changes	$ 2,900	$ 3,300	$ (1,100)
Statutory tax rate changes, percentage	1.90%	1.50%	(0.50%)
Provision for income taxes	$ 48,900	$ 60,300	$ 52,400
Consolidated effective income tax rate, percentage	31.30%	28.00%	26.20%
Common Stock [Member]
Accelerated Share Repurchases [Line Items]
Other non-deductible expenses, Percentage			0.00%
Common Stock [Member]
Accelerated Share Repurchases [Line Items]
Other non-deductible expenses, Percentage	4.60%	0.00%
Other non-deductible expenses	$ 7,200	$ 0	$ 0