Summary Of Significant Accounting Policies (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2018		Jun. 30, 2017	Jun. 30, 2016	Nov. 30, 2010
Summary Of Accounting Policies [Line Items]
Preferred stock, shares authorized (in shares)	3,050,000		3,050,000
Shares authorized for repurchase (in shares)					2,000,000
Shares remaining authorized for future purchase (in shares)	1,402,219
Tax Cuts And Jobs Act of 2017, Reclassification from accumulated other comprehensive loss to retained earnings	$ 1,889	[1]	$ 0
Class A Participating Preferred Stock[Member]
Summary Of Accounting Policies [Line Items]
Preferred stock, shares authorized (in shares)	750,000
Preferred stock, par value (in dollars per share)	$ 1.00
Class B Voting Preferred Stock[Member]
Summary Of Accounting Policies [Line Items]
Preferred stock, shares authorized (in shares)	1,150,000
Preferred stock, par value (in dollars per share)	$ 0
Class C Nonvoting Preferred Stock [Member]
Summary Of Accounting Policies [Line Items]
Preferred stock, shares authorized (in shares)	1,150,000
Preferred stock, par value (in dollars per share)	$ 0
Maximum [Member]
Summary Of Accounting Policies [Line Items]
Research and development costs as a percentage of net sales	1.00%		1.00%	1.00%
Buildings And Improvements [Member] | Minimum [Member]
Summary Of Accounting Policies [Line Items]
Estimated useful life (in years)	10 years
Buildings And Improvements [Member] | Maximum [Member]
Summary Of Accounting Policies [Line Items]
Estimated useful life (in years)	40 years
Machinery And Equipment [Member] | Minimum [Member]
Summary Of Accounting Policies [Line Items]
Estimated useful life (in years)	3 years
Machinery And Equipment [Member] | Maximum [Member]
Summary Of Accounting Policies [Line Items]
Estimated useful life (in years)	15 years
Technology-Related Equipment [Member] | Minimum [Member]
Summary Of Accounting Policies [Line Items]
Estimated useful life (in years)	3 years
Technology-Related Equipment [Member] | Maximum [Member]
Summary Of Accounting Policies [Line Items]
Estimated useful life (in years)	5 years

[1] See further discussion of this reclassification under the caption “Recently Adopted Accounting Standards” within Note 1.