v3.26.1
Income Taxes - Reconciliation of Income Taxes at Statutory Rate After Adoption of ASU 2023-09 (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Mar. 31, 2024
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]      
United States statutory income tax expense   $ 85,381 $ 61,358
AMPC Impact   (38,764) (28,636)
Domestic state and local income taxes, net of federal   7,361 (995)
Changes in valuation   (4,270) 6,849
Changes in unrecognized tax benefits $ (791)    
Total income tax expense $ 53,849 $ 42,842 $ 23,089
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
Changes in unrecognized tax benefits (0.20%)    
Effective income tax rates 15.50% 10.50% 7.90%
United States      
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]      
United States statutory income tax expense $ 72,955    
AMPC Impact (33,305)    
Other tax credits (970)    
Nondeductible officer’s compensation 4,724    
Other nontaxable or nondeductible items (894)    
Global intangible low-taxed income 4,129    
Other cross-border tax laws 724    
Other reconciling items (53)    
Domestic state and local income taxes, net of federal $ 2,453    
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
US federal statutory income tax rate 21.00%    
AMPC Impact (9.60%)    
Other tax credits (0.30%)    
Nondeductible officer’s compensation 1.40%    
Other nontaxable or nondeductible items (0.30%)    
Global intangible low-taxed income 1.20%    
Other cross-border tax laws 0.20%    
Other reconciling items 0.00%    
Domestic state and local income taxes, net of federal 0.70%    
Foreign      
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
Effective income tax rates 24.20% 0.10% 13.80%
Brazil      
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]      
Changes in valuation $ 8,384    
Other $ (2,180)    
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
Changes in valuation 2.40%    
Other (0.60%)    
Mexico      
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]      
Other $ 2,243    
Tax incentives $ (5,310)    
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
Other 0.60%    
Tax incentives (1.50%)    
Switzerland      
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]      
Other $ 1,215    
Statutory income tax rate (14,472)    
Cantonal Taxes 5,476    
IP Transaction $ 4,208    
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
Other 0.30%    
Statutory income tax rate (4.20%)    
Cantonal Taxes 1.60%    
IP Transaction 1.20%    
Other foreign jurisdictions      
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]      
Statutory income tax rate $ 5,313    
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
Statutory income tax rate 1.50%