Valuation and Qualifying Accounts Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Deferred tax asset—valuation allowance
Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 17,519	$ 15,255	$ 27,053
Additions Charged to Expense	7,494	2,978	4,853
Charge-Offs	(3,145)	(99)	(14,132)
Business Combination Adjustments	(688)	1,157	0
Other	(229)	(1,772)	(2,519)
Balance at End of Period	20,951	17,519	15,255
Allowance for doubtful accounts
Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	10,813	12,643	12,662
Additions Charged to Expense	4,821	1,385	822
Charge-Offs	(642)	(2,459)	(1,400)
Other	254	(756)	559
Balance at End of Period	$ 15,246	$ 10,813	$ 12,643