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Intangibles and Goodwill (Details 2)
Oct. 31, 2015
USD ($)
Estimated annual amortization expense of intangible assets for next five years  
Nine month period ending July 31, 2016 $ 9,716,000
2017 12,569,000
2018 12,267,000
2019 11,943,000
2020 10,186,000
2021 $ 9,816,000