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Other Events - Additional Information (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
0 Months Ended 9 Months Ended
Dec. 12, 2013
Jul. 31, 2014
Jul. 31, 2013
Other Events [Abstract]      
Dividend payment $ 0.70    
Dividend aggregate amount to shareholders $ 11,000 $ 11,005 $ 9,646
Dividend paid date Nov. 29, 2013