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Goodwill and Intangible Assets - Amortization (Details) - USD ($)
$ in Thousands
12 Months Ended
Feb. 28, 2018
Feb. 28, 2017
Feb. 29, 2016
Goodwill and Intangible Assets      
Aggregate Amortization Expense $ 18,854 $ 22,024 $ 21,514
Estimated Amortization Expense      
Fiscal 2019 14,018    
Fiscal 2020 12,428    
Fiscal 2021 10,384    
Fiscal 2022 4,078    
Fiscal 2023 $ 3,995