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Summary of Significant Accounting Policies - Additional Information (Detail)
2 Months Ended 3 Months Ended 12 Months Ended
May 02, 2022
USD ($)
Nov. 01, 2019
USD ($)
Feb. 29, 2020
USD ($)
Feb. 29, 2020
USD ($)
Aug. 31, 2019
USD ($)
May 31, 2022
USD ($)
Jointventure
Facility
Customer
Segment
May 31, 2021
USD ($)
Customer
May 31, 2020
USD ($)
Jun. 08, 2021
Dec. 31, 2019
Significant Accounting Policies [Line Items]                    
Number of joint ventures | Jointventure           9        
Equity method investment, purchase price           $ 6,811,000        
Impairment of long-lived assets     $ 4,679,000              
Derivative financial instruments, credit losses           $ 0        
Number of manufacturing facilities operated | Facility           28        
Number of reportable segments | Segment           4        
Allowance for doubtful accounts increase (decrease)           $ 684,000        
Receivables, allowances           1,292,000 $ 608,000      
Depreciation Expenses           83,272,000 74,779,000 $ 79,368,000    
Advertising Expenses           $ 21,613,000 $ 17,462,000 $ 17,603,000    
Maximum                    
Significant Accounting Policies [Line Items]                    
Period allowed for payment of dues to customers           60 days        
Maximum | Building and Building Improvements                    
Significant Accounting Policies [Line Items]                    
Property, plant and equipment, estimated useful life           40 years        
Maximum | Machinery and Equipment                    
Significant Accounting Policies [Line Items]                    
Property, plant and equipment, estimated useful life           20 years        
Minimum                    
Significant Accounting Policies [Line Items]                    
Period allowed for payment of dues to customers           30 days        
Minimum | Building and Building Improvements                    
Significant Accounting Policies [Line Items]                    
Property, plant and equipment, estimated useful life           10 years        
Minimum | Machinery and Equipment                    
Significant Accounting Policies [Line Items]                    
Property, plant and equipment, estimated useful life           3 years        
Largest Customer                    
Significant Accounting Policies [Line Items]                    
Number of customers | Customer           10 10      
Sales Revenue, Net | Product Concentration Risk | Automotive Industries                    
Significant Accounting Policies [Line Items]                    
Concentration risk percentage           37.00% 37.00% 32.00%    
Sales Revenue, Net | Foreign Operations | International Operations                    
Significant Accounting Policies [Line Items]                    
Concentration risk percentage           6.00% 7.00% 7.00%    
Sales Revenue, Net | Customer Concentration Risk | Largest Customer                    
Significant Accounting Policies [Line Items]                    
Concentration risk percentage           13.00%        
Sales Revenue, Net | Customer Concentration Risk | Largest Customer | Maximum                    
Significant Accounting Policies [Line Items]                    
Concentration risk percentage             11.00%      
Sales Revenue, Net | Customer Concentration Risk | Ten Largest Customers                    
Significant Accounting Policies [Line Items]                    
Concentration risk percentage           34.00% 34.00%      
Net Earnings | Foreign Operations                    
Significant Accounting Policies [Line Items]                    
Concentration risk percentage           0.30% (1.00%) 2.00%    
Net Assets, Geographic Area | Foreign Operations | International Operations                    
Significant Accounting Policies [Line Items]                    
Concentration risk percentage           10.00% 9.00%      
Workforce Subject to Collective Bargaining Arrangements | Labor Force Concentration Risk [Member]                    
Significant Accounting Policies [Line Items]                    
Concentration risk percentage           15.00%        
Engineered Cabs                    
Significant Accounting Policies [Line Items]                    
Impairment of long-lived assets         $ 35,194,000          
Workhorse                    
Significant Accounting Policies [Line Items]                    
Percent of ownership interest held in unconsolidated affiliates   20.00%       20.00%        
Net gain on deconsolidation   $ 258,000                
Joint Venture Transactions                    
Significant Accounting Policies [Line Items]                    
Number of joint ventures | Jointventure           4        
Number of manufacturing facilities operated | Facility           48        
Spartan | Joint Venture Transactions                    
Significant Accounting Policies [Line Items]                    
Percent of controlling interest by the Company           52.00%        
TWB                    
Significant Accounting Policies [Line Items]                    
Percent of controlling interest by the Company                 55.00%  
TWB | Joint Venture Transactions                    
Significant Accounting Policies [Line Items]                    
Percent of controlling interest by the Company           55.00%        
Samuel | Joint Venture Transactions                    
Significant Accounting Policies [Line Items]                    
Percent of controlling interest by the Company           63.00%        
Worthington Specialty Processing | Joint Venture Transactions                    
Significant Accounting Policies [Line Items]                    
Percent of controlling interest by the Company           51.00%        
Samuel Joint Venture                    
Significant Accounting Policies [Line Items]                    
Gain in pre-tax earnings               $ 6,055,000    
Samuel Joint Venture | Miscellaneous Income                    
Significant Accounting Policies [Line Items]                    
Gain in pre-tax earnings       $ 6,055,000            
Samuel Joint Venture | Joint Venture Transactions                    
Significant Accounting Policies [Line Items]                    
Additional ownership interest acquired in joint venture           31.75%       31.75%
Percent of ownership interest held in unconsolidated affiliates           63.00%        
Worthington Taylor, LLC                    
Significant Accounting Policies [Line Items]                    
Percent of ownership interest held in unconsolidated affiliates 49.00%                  
Equity method investment, purchase price $ 6,800,000