Significant Accounting Policies-Earnings Per Share (Detail)	3 Months Ended		6 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Schedule of Weighted Average Number of Diluted Shares Outstanding [Line Items]
Weighted average shares, basic EPS	19,154,000	19,096,000	19,125,000	19,096,000
Number of dilutive stock options	342,000	160,000		80,000
Weighted average shares, diluted EPS	19,496,000	19,256,000	19,125,000	19,176,000