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Business Segment Information (Details) - USD ($)
 12 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2019
Segment Reporting Information [Line Items]      
Revenues $ 649,642,000 $ 809,162,000 $ 876,282,000
Total assets: 1,150,432,000 1,093,272,000 1,061,571,000
Long-Lived Assets 619,291,000 617,114,000 643,059,000
Chain And Forged Attachments [Member]      
Segment Reporting Information [Line Items]      
Revenues 47,557,000 68,666,000 89,215,000
Hoists      
Segment Reporting Information [Line Items]      
Revenues 394,682,000 492,126,000 518,806,000
Industrial cranes      
Segment Reporting Information [Line Items]      
Revenues 37,025,000 44,149,000 59,085,000
Actuators and rotary unions      
Segment Reporting Information [Line Items]      
Revenues 75,458,000 77,957,000 77,719,000
Digital Power Control and Delivery Systems [Member]      
Segment Reporting Information [Line Items]      
Revenues 74,943,000 100,658,000 98,187,000
Elevator Application Drive Systems [Member]      
Segment Reporting Information [Line Items]      
Revenues 19,977,000 25,606,000 25,548,000
Other      
Segment Reporting Information [Line Items]      
Revenues 0 0 7,722,000
United States      
Segment Reporting Information [Line Items]      
Revenues 348,986,000 450,242,000 485,969,000
Total assets: 540,184,000 518,914,000 496,580,000
Long-Lived Assets 269,061,000 272,816,000 282,456,000
GERMANY      
Segment Reporting Information [Line Items]      
Revenues 164,380,000 175,492,000 196,055,000
Total assets: 435,638,000 438,210,000 429,859,000
Long-Lived Assets 336,606,000 327,420,000 342,150,000
Europe, Middle East, and Africa (Excluding Germany)      
Segment Reporting Information [Line Items]      
Revenues 90,415,000 121,600,000 127,453,000
Total assets: 125,262,000 86,638,000 85,680,000
Long-Lived Assets 8,359,000 9,561,000 10,163,000
Canada      
Segment Reporting Information [Line Items]      
Revenues 15,443,000 21,984,000 22,206,000
Total assets: 8,647,000 9,979,000 8,688,000
Long-Lived Assets 1,395,000 1,192,000 1,319,000
Asia Pacific [Member]      
Segment Reporting Information [Line Items]      
Revenues 13,829,000 14,193,000 17,749,000
Total assets: 19,326,000 20,314,000 22,129,000
Long-Lived Assets 2,235,000 4,928,000 5,781,000
Latin America [Member]      
Segment Reporting Information [Line Items]      
Revenues 16,589,000 25,651,000 26,850,000
Total assets: 21,375,000 19,217,000 18,635,000
Long-Lived Assets $ 1,635,000 $ 1,197,000 1,190,000
Chain and rigging tools | Chain And Forged Attachments [Member]      
Segment Reporting Information [Line Items]      
Revenues     12,289,000
Chain and rigging tools | Industrial cranes      
Segment Reporting Information [Line Items]      
Revenues     14,184,000
Chain and rigging tools | Other      
Segment Reporting Information [Line Items]      
Revenues     $ 7,722,000