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Derivative Instruments (Schedule of Derivative Gains and Losses) (Details) - Interest Rate Swap - Designated as Hedging Instrument - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Derivative [Line Items]    
Loss Recognized in Other Comprehensive Loss (effective portion) $ (4,864) $ 0
Interest Expense    
Derivative [Line Items]    
Gain (Loss) Reclassified from Accumulative Other Comprehensive Loss into Income 0 0
Gain Recognized as Income $ 62 $ 0