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Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Components of Accumulated Other Comprehensive Loss $ 1,358,298 $ 1,170,971 $ 1,095,831 $ 1,178,610
Other comprehensive income (loss), cash flow hedge, gain (loss), reclassification, tax 543 1,453    
Other comprehensive income (loss), defined benefit plan, gain (loss) arising during period, tax (276) 17    
Accumulated other comprehensive loss, net of tax        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Components of Accumulated Other Comprehensive Loss (19,801) (44,161) $ (25,747) $ (19,315)
Cumulative translation adjustment        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Components of Accumulated Other Comprehensive Loss (18,908) (39,241)    
Unrealized loss on interest rate swaps, net of tax of $543 and $1,453, respectively        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Components of Accumulated Other Comprehensive Loss (1,819) (4,864)    
Unrecognized net gain (loss) on pension plans, net of tax of $(276) and $17, respectively        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
Components of Accumulated Other Comprehensive Loss $ 926 $ (56)