Goodwill and Intangible Assets (Details) - USD ($)	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gain (Loss) on Disposition of Business	$ (176,000)	$ (25,672,000)	$ 0
Gain (Loss) on Disposition of Property Plant Equipment	0
Goodwill, Impaired, Accumulated Impairment Loss	113,174,000	113,174,000
Goodwill [Roll Forward]
Opening Balance	322,816,000	347,434,000
Acquisition of Hebetechnik (See Note 3)	(3,137,000)	(18,444,000)
Closing Balance	319,679,000	322,816,000	347,434,000
Gross Carrying Amount	282,380,000	285,490,000
Indefinite-lived trademark	46,670,000	46,981,000
Accumulated Amortization	(64,418,000)	(52,550,000)
Net	217,962,000	232,940,000
Amortization of intangibles	12,942,000	14,900,000	15,552,000
Trademark
Goodwill [Roll Forward]
Gross Carrying Amount	6,016,000	6,212,000
Accumulated Amortization	(4,238,000)	(4,138,000)
Net	1,778,000	2,074,000
Customer relationships
Goodwill [Roll Forward]
Gross Carrying Amount	179,882,000	182,328,000
Accumulated Amortization	(44,216,000)	(35,344,000)
Net	135,666,000	146,984,000
Acquired technology
Goodwill [Roll Forward]
Gross Carrying Amount	46,669,000	46,715,000
Accumulated Amortization	(13,306,000)	(10,412,000)
Net	33,363,000	36,303,000
Other
Goodwill [Roll Forward]
Gross Carrying Amount	3,143,000	3,254,000
Accumulated Amortization	(2,658,000)	(2,656,000)
Net	$ 485,000	598,000
STAHL [Member]
Finite-Lived Intangible Assets [Line Items]
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Intangibles		(6,174,000)
Goodwill [Member]
Finite-Lived Intangible Assets [Line Items]
Gain (Loss) on Disposition of Property Plant Equipment		$ 6,174,000	$ 0