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Restructuring - Summary of Activity and Balances of Restructuring Reserve (Details) - Severance for Involuntary Employee Terminations [Member]
$ in Thousands
12 Months Ended
Mar. 31, 2020
USD ($)
Restructuring Cost And Reserve [Line Items]  
Balance at March 31, 2019 $ 0
Reserve established 2,456
Increase to reserve 271
Utilization of reserve:  
Payments (2,706)
Balance at March 31, 2020 $ 21