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Goodwill and Intangible Assets - Narrative (Details)
3 Months Ended 9 Months Ended
Dec. 31, 2020
USD ($)
Feb. 28, 2021
USD ($)
Feb. 29, 2020
USD ($)
Feb. 28, 2021
USD ($)
unit
Feb. 29, 2020
USD ($)
Finite-Lived Intangible Assets [Line Items]          
Number of reporting units | unit       1  
Goodwill impairment $ 0        
Amortization of intangibles   $ 4,292,000 $ 5,019,000 $ 13,838,000 $ 13,417,000
Minimum          
Finite-Lived Intangible Assets [Line Items]          
Estimated useful life of intangible assets other than goodwill       2 years  
Maximum          
Finite-Lived Intangible Assets [Line Items]          
Estimated useful life of intangible assets other than goodwill       18 years