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Goodwill and Intangible Assets - Summary of amortization expense attributable to intangible assets (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Aug. 31, 2019
Aug. 31, 2018
Aug. 31, 2019
Aug. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]        
Aggregate Amortization Expense $ 4,463 $ 3,402 $ 8,339 $ 7,522