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Leases - Future Minimum Income For Noncancelable Sublease Rentals (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Leases [Abstract]    
Rent expense $ 82,700 $ 81,200
Sublease income 600 $ 600
Operating Lease Payments    
2020 70,614  
2021 68,888  
2022 58,325  
2023 53,463  
2024 46,222  
Thereafter 125,399  
Operating leases, future minimum payments due 422,911  
Operating Sublease Income    
2020 129  
2021 12  
2022 5  
2023 0  
2024 0  
Thereafter 0  
Operating leases, future minimum payments due, future minimum sublease rentals $ 146