Summary Of Significant Accounting Policies (Narrative) (Details) - $ / shares	12 Months Ended
	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)	1,411,680
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
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