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Long-Lived Assets - Narrative (Details)
$ in Thousands
Apr. 30, 2016
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Estimated amortization, 2016 $ 1,591
Estimated amortization, 2017 1,492
Estimated amortization, 2018 1,393
Estimated amortization, 2019 473
Estimated amortization, 2020 440
Estimated amortization, after 2020 $ 2,332