Business Acquisitions and Divestitures Fiscal 2017 Divestitures (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Mar. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues		$ 774,261	$ 696,238	$ 2,207,904	$ 2,013,957
Proceeds from sale of business				(439)
Pre-tax gain or loss on sale of business	[1]	$ (76)	$ 1,170	2,553	$ (508)
China HCS [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Pre-tax gain or loss on sale of business				$ (2,365)
HCS China Divestiture [Domain]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues						$ 5,000

[1] For more information regarding our recent acquisitions and divestitures see Note 17 titled, "Business Acquisitions and Divestitures", as well as our Annual Report on Form 10-K for the year ended March 31, 2019, dated May 30, 2019.