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Loss Contingencies (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2018
Loss Contingencies [Line Items]      
Malpractice Loss Contingency, Discount Rate 65.00%    
Loss Contingency Accrual [Roll Forward]      
Accrued general and product liability, beginning of year $ 12,686 $ 13,582 $ 13,335
Add provision for claims 3,233 2,887 3,965
Deduct payments for claims (3,975) (3,783) (3,718)
Accrued general and product liability, end of year $ 11,944 $ 12,686 $ 13,582