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Goodwill And Other Intangible Assets (Expected Amortization Expense Relating To Existing Intangible Assets) (Details) (USD $)
In Thousands, unless otherwise specified
Apr. 30, 2015
Goodwill And Other Intangible Assets [Abstract]  
Remaining 2015 $ 2,588us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear
2016 5,375us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths
2017 5,235us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
2018 4,000us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
2019 3,449us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
2020 3,364us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
Thereafter $ 12,481us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive