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Derivative Financial Instruments - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2019
Sep. 30, 2019
Sep. 30, 2018
Derivative [Line Items]      
Gain (loss) recognized in income $ (1,809) $ (2,460)  
Loss on Derivatives      
Derivative [Line Items]      
Unrealized losses on designated cash flow hedges   817 $ 716
Tax of unrealized losses on designated cash flow hedges   $ (478) $ (190)