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Earnings Per Share (Detail)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2013
Mar. 31, 2012
Earnings Per Share Disclosure [Line Items]        
Weighted average common shares outstanding-basic 36,842 36,864 36,835 36,975
Dilutive effect of stock options 66 66 66 68
Weighted average common shares outstanding-diluted 36,908 36,930 36,901 37,043