v3.26.1
Business Segments - Schedule of Financial Information for Corporation's Reportable Segments (Detail) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net sales $ 108,327 $ 104,265
Costs of products sold (excluding depreciation and amortization) 86,755 82,104
Selling and administrative 13,884 13,659
Depreciation and amortization 4,258 4,636
Income from operations 2,562 3,850
Reconciliation to (loss) income before income taxes    
Interest expense (2,723) (2,726)
Income before income taxes 435 1,950
Operating Segments    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net sales 108,327 104,265
Income from operations 6,298 7,399
Operating Segments | FCEP    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net sales 70,809 72,287
Costs of products sold (excluding depreciation and amortization) 59,191 57,613
Selling and administrative 5,920 6,385
Depreciation and amortization 3,924 4,368
(Gain) loss on disposal of assets (7) 16
Deconsolidation Charge 875  
Income from operations 906 3,905
Operating Segments | ALP    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Net sales 37,518 31,978
Costs of products sold (excluding depreciation and amortization) 27,564 24,491
Selling and administrative 4,235 3,725
Depreciation and amortization 327 268
Income from operations 5,392 3,494
Reconciling Item, Excluding Corporate Nonsegment    
Reconciliation to (loss) income before income taxes    
Interest expense (2,723) (2,726)
Other income - net 596 826
Corporate Nonsegment    
Revenues from External Customers and Long-Lived Assets [Line Items]    
Depreciation and amortization 7  
Reconciliation to (loss) income before income taxes    
Corporate costs $ (3,736) $ (3,549)