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Goodwill and Other Intangible Assets - Schedule of Changes in Carrying Amount of Goodwill by Business Segment (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2021
Mar. 31, 2021
Mar. 31, 2020
Mar. 31, 2019
Goodwill [Roll Forward]        
Balance at beginning of year   $ 663,936 $ 656,399  
Acquisitions during the year     73,788  
Measurement period adjustments   2,996 (1,390)  
Goodwill impairment charge $ (39,713) 0 (39,713) $ 0
Foreign currency translation adjustment   38,661 (25,148)  
Balance at end of year 705,593 705,593 663,936 656,399
Goodwill Reallocation, Adjusted Balance        
Goodwill [Roll Forward]        
Balance at beginning of year   663,936    
Balance at end of year     663,936  
Energy Systems        
Goodwill [Roll Forward]        
Measurement period adjustments   1,348    
Foreign currency translation adjustment   15,178    
Balance at end of year 279,676 279,676    
Energy Systems | Reallocation to new Reporting Units        
Goodwill [Roll Forward]        
Balance at beginning of year   263,150    
Balance at end of year     263,150  
Energy Systems | Goodwill Reallocation, Adjusted Balance        
Goodwill [Roll Forward]        
Balance at beginning of year   263,150    
Balance at end of year     263,150  
Motive Power        
Goodwill [Roll Forward]        
Measurement period adjustments   0    
Foreign currency translation adjustment   18,558    
Balance at end of year 327,055 327,055    
Motive Power | Reallocation to new Reporting Units        
Goodwill [Roll Forward]        
Balance at beginning of year   308,497    
Balance at end of year     308,497  
Motive Power | Goodwill Reallocation, Adjusted Balance        
Goodwill [Roll Forward]        
Balance at beginning of year   308,497    
Balance at end of year     308,497  
Specialty        
Goodwill [Roll Forward]        
Measurement period adjustments   1,648    
Foreign currency translation adjustment   4,925    
Balance at end of year 98,862 98,862    
Specialty | Reallocation to new Reporting Units        
Goodwill [Roll Forward]        
Balance at beginning of year   92,289    
Balance at end of year     92,289  
Specialty | Goodwill Reallocation, Adjusted Balance        
Goodwill [Roll Forward]        
Balance at beginning of year   92,289    
Balance at end of year     92,289  
Americas        
Goodwill [Roll Forward]        
Balance at beginning of year   524,156 470,194  
Acquisitions during the year     72,056  
Measurement period adjustments     (1,390)  
Foreign currency translation adjustment     (16,704)  
Balance at end of year 0 0 524,156 470,194
Accumulated impairment charges     57,845  
Americas | Reallocation to new Reporting Units        
Goodwill [Roll Forward]        
Balance at beginning of year   (524,156)    
Balance at end of year     (524,156)  
Americas | Goodwill Reallocation, Adjusted Balance        
Goodwill [Roll Forward]        
Balance at beginning of year   0    
Balance at end of year     0  
EMEA        
Goodwill [Roll Forward]        
Balance at beginning of year   139,780 143,269  
Acquisitions during the year     1,732  
Foreign currency translation adjustment     (5,221)  
Balance at end of year 0 0 139,780 143,269
EMEA | Reallocation to new Reporting Units        
Goodwill [Roll Forward]        
Balance at beginning of year   (139,780)    
Balance at end of year     (139,780)  
EMEA | Goodwill Reallocation, Adjusted Balance        
Goodwill [Roll Forward]        
Balance at beginning of year   0    
Balance at end of year     0  
Asia        
Goodwill [Roll Forward]        
Balance at beginning of year   0 42,936  
Goodwill impairment charge     (39,713)  
Foreign currency translation adjustment     (3,223)  
Balance at end of year $ 0 0 0 $ 42,936
Accumulated impairment charges     44,892  
Asia | Goodwill Reallocation, Adjusted Balance        
Goodwill [Roll Forward]        
Balance at beginning of year   $ 0    
Balance at end of year     $ 0