Stockholders' Equity Transactions (Narrative) (Detail) - shares	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015	Sep. 16, 2014
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased				1,000,000
Common Stock Shares Outstanding	18,844,657	18,786,893		19,400,000
Employee 2012 And 2002 Stock Option Plan [Member]
Equity, Class of Treasury Stock [Line Items]
Stock Issued During Period Shares Stock Options Exercised	143,300
Conversion of Stock, Shares Converted	135,300
Treasury Stock, Shares, Acquired	85,536
Employee Stock Option Plan 2002 [Member]
Equity, Class of Treasury Stock [Line Items]
Stock Issued During Period Shares Stock Options Exercised		87,000	67,500
Treasury Stock, Shares, Acquired		53,868