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Income (Loss) Per Share Data - Additional Information (Detail)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Earnings Per Share [Abstract]        
Weighted average diluted shares outstanding excluded outstanding stock options 0.3 0.7 0.5 0.7