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Valuation and Qualifying Accounts Valuation and Qualifying Accounts (Details) - USD ($)
$ in Thousands
 12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Mar. 31, 2017
Deferred tax asset—valuation allowance      
Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Period $ 15,255 $ 27,053 $ 25,416
Additions Charged to Expense 2,978 4,853 4,305
Charge-Offs (99) (14,132) (2,255)
Business Combination Adjustments 1,157 0 0
Other (1,772) (2,519) (413)
Balance at End of Period 17,519 15,255 27,053
Allowance for doubtful accounts      
Valuation Allowances and Reserves [Roll Forward]      
Balance at Beginning of Period 12,643 12,662 11,393
Additions Charged to Expense 1,385 822 1,794
Charge-Offs (2,459) (1,400) (173)
Other (756) 559 (352)
Balance at End of Period $ 10,813 $ 12,643 $ 12,662