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Goodwill and Intangible Assets (Details 2) - USD ($)
$ in Thousands
May 31, 2021
May 31, 2020
Expected amortization expense    
2020 $ 15,156  
2021 15,595  
2022 14,111  
2023 15,131  
2024 16,138  
2025 and thereafter 92,846  
Net carrying value, finite-lived intangible assets $ 168,977 $ 197,136