Income Taxes (Reconciliation of U.S.Federal Income Tax Expense) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Income Tax Disclosure [Abstract]
U.S. Federal income tax at statutory rate	$ 33,603	$ 34,967	$ 43,088
State and local income taxes, net of Federal benefit	1,578	1,318	1,974
Tax credits	(2,517)	(1,435)	(1,935)
Valuation allowance	541	582	803
Effect of foreign operations, net	(1,150)	(1,665)	(1,627)
Stock compensation	(62)	(419)	(494)
Capitalized acquisition costs	70	839	0
Other	328	300	(491)
Provision for income taxes	$ 32,391	$ 34,487	$ 41,318