Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Statutory rate percentage of federal income tax expense	35.00%
Valuation allowance, amount	$ 2,509	$ 1,696
Income before income taxes	99,906	123,107	$ 53,026
Gross unrecognized tax benefits	1,301	1,153	1,034	$ 1,257
Unrecognized tax benefits that would impact effective tax rate if recognized	800
Unrecognized tax benefits, period increase	100
Income tax penalties and interest accrued	1,200	$ 1,100	$ 900
State and Local [Member]
Operating loss carry forwards	1,600
Tax credit carry forwards	400
Operating loss carry forwards, valuation allowance	100
Withholding Tax Credits [Member]
Tax credit carry forwards	1,900
Valuation allowance, amount	1,900
Foreign Tax Credits [Member]
Valuation allowance, amount	300
Foreign [Member]
Operating loss carry forwards	6,500
Undistributed earnings of foreign subsidiaries	93,900
Undistributed earnings of foreign subsidiaries, tax effect	16,300
Valuation Allowance, Operating Loss Carryforwards [Member] | Foreign [Member]
Valuation allowance, deferred tax asset, change in amount	$ 300
Minimum [Member]
Open Tax Year	2010
Europe Communications [Member]
Income before income taxes	$ 4,200
Utilization percentage of deferred tax asset	45.00%