Goodwill and Intangible Assets (Details) - USD ($)	3 Months Ended		9 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Mar. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 3,229,000	$ 3,701,000	$ 9,708,000	$ 11,358,000
Goodwill [Roll Forward]
Balance at April 1, 2019			322,816,000
Currency translation			(50,000)
Balance at December 31, 2019	322,766,000		322,766,000
Gross Carrying Amount	285,155,000		285,155,000		$ 285,490,000
Accumulated Amortization	(61,949,000)		(61,949,000)		(52,550,000)
Net	223,206,000		223,206,000		232,940,000
Indefinite-Lived Trademarks	46,971,000		46,971,000		46,981,000
Trademark
Goodwill [Roll Forward]
Gross Carrying Amount	6,162,000		6,162,000		6,212,000
Accumulated Amortization	(4,289,000)		(4,289,000)		(4,138,000)
Net	1,873,000		1,873,000		2,074,000
Indefinite-lived Intangible Assets [Member]
Goodwill [Roll Forward]
Accumulated Amortization	0		0		0
Customer relationships
Goodwill [Roll Forward]
Gross Carrying Amount	182,059,000		182,059,000		182,328,000
Accumulated Amortization	(42,341,000)		(42,341,000)		(35,344,000)
Net	139,718,000		139,718,000		146,984,000
Unpatented Technology [Member]
Goodwill [Roll Forward]
Gross Carrying Amount	46,619,000		46,619,000		46,715,000
Accumulated Amortization	(12,496,000)		(12,496,000)		(10,412,000)
Net	34,123,000		34,123,000		36,303,000
Other
Goodwill [Roll Forward]
Gross Carrying Amount	3,344,000		3,344,000		3,254,000
Accumulated Amortization	(2,823,000)		(2,823,000)		(2,656,000)
Net	$ 521,000		$ 521,000		$ 598,000