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Employee Benefit Plans (Amounts Recognized on Balance Sheet) (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Current liabilities $ 1,849 $ 1,763
Non-current liabilities 51,448 42,434
Total liabilities $ 53,297 $ 44,197