Stockholders' Equity Transactions (Narrative) (Detail) - shares	3 Months Ended	6 Months Ended
	Dec. 31, 2017	Dec. 31, 2017	Jun. 30, 2017	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	18,826,742	18,826,742	18,844,657	19,400,000
Stock Repurchased During Period, Shares	22,600	22,600