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Debt (Details) - USD ($)
 6 Months Ended 12 Months Ended
Jun. 01, 2023
Sep. 30, 2024
Mar. 31, 2024
Line of Credit Facility [Line Items]      
Accounts receivable balance   $ 170,669,000 $ 171,186,000
Current portion of long-term debt and finance lease obligations   50,000,000  
Outstanding balance on finance lease obligation   12,611,000 12,937,000
Current portion of long-term debt and finance lease obligation   704,000 670,000
Unsecured Lines of Credit      
Line of Credit Facility [Line Items]      
Line of credit facility, maximum borrowing capacity   2,450,000  
Outstanding borrowings   $ 0  
Hartland, WI      
Line of Credit Facility [Line Items]      
Finance lease term   23 years  
Amended and Restated Revolving Credit Facility      
Line of Credit Facility [Line Items]      
Line of credit facility increase in borrowing capacity     75,000,000
Line of credit facility, maximum borrowing capacity     175,000,000
Outstanding borrowings   $ 0  
Outstanding letters of credit   15,692,000  
Deferred financing costs gross   4,828,000 4,828,000
Accumulated amortization of deferred financing costs   3,194,000 2,655,000
Amended and Restated Revolving Credit Facility | Standby Letters of Credit      
Line of Credit Facility [Line Items]      
Outstanding letters of credit   15,692,000  
Term Loan B      
Line of Credit Facility [Line Items]      
Debt instrument increase in face amount $ 75,000,000    
Repayments of long-term debt   30,000,000  
Outstanding borrowings   447,560,000  
Periodic payment required   2,488,000  
Current portion of long-term debt and finance lease obligations   4,976,000  
Deferred financing costs gross   7,845,000 7,845,000
Accumulated amortization of deferred financing costs   3,586,000 2,971,000
AR Securitization      
Line of Credit Facility [Line Items]      
Long-term debt   45,000,000 45,000,000
Deferred financing costs gross   536,000  
Accumulated amortization of deferred financing costs   238,000 $ 149,000
AR Securitization | UNITED STATES      
Line of Credit Facility [Line Items]      
Accounts receivable balance   76,818,000  
Bank Guarantees | Unsecured Lines of Credit      
Line of Credit Facility [Line Items]      
Line of credit facility, maximum borrowing capacity   13,732,000  
Outstanding borrowings   $ 10,573,000