Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Income Tax Authority [Line Items]
Gross tax contingency reserve	$ 1,599,000	$ 1,487,000	$ 963,000
Accrued tax liabilities included in the gross tax contingency reserve	1,000,000
Accrued interest and penalties included in the gross tax contingency reserve	571,000	479,000
Gross tax contingency reserve, classified as current liabilities	0
Gross tax contingency reserve, classified as noncurrent liabilities	$ 1,599,000	1,487,000
Qualified manufacturing activities deduction percentage	9.00%
Federal [Member]
Income Tax Authority [Line Items]
Prepaid income taxes	$ 4,300,000	3,800,000
State and Local [Member]
Income Tax Authority [Line Items]
Prepaid income taxes	$ 500,000	$ 600,000