Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Income Tax Authority [Line Items]
Gross tax contingency reserve	$ 1,808	$ 1,599	$ 1,487
Accrued tax liabilities included in the gross tax contingency reserve	1,100
Accrued interest and penalties included in the gross tax contingency reserve	683	571
Gross tax contingency reserve, classified as current liabilities	600
Gross tax contingency reserve, classified as noncurrent liabilities	$ 1,241	1,599
Qualified manufacturing activities deduction percentage	9.00%
Federal [Member]
Income Tax Authority [Line Items]
Prepaid income taxes	$ 6,100	4,300
State and Local [Member]
Income Tax Authority [Line Items]
Prepaid income taxes	$ 900	$ 500