v3.25.4
Business Segments - Schedule of Segment Reporting Information for Operating Results and Capital Expenditures (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Segment Reporting Information [Line Items]      
Net sales $ 606,038 $ 525,324 $ 681,477
Less:      
Cost of materials 106,743 104,141 134,377
Direct operating expenses (exclusive of depreciation and amortization and turnaround expenses) 254,058 214,222 234,916
Turnaround expenses 16,700 500 1,800
Depreciation and amortization 81,867 88,096 79,720
Selling, general and administrative expenses 33,594 28,414 29,523
Interest income (5,492) (4,217) (5,664)
Net income 98,662 60,900 172,433
Nitrogen Fertilizer Segment      
Segment Reporting Information [Line Items]      
Net sales 606,038 525,324 681,477
Less:      
Feedstocks 58,715 55,427 76,831
Distribution costs 49,304 49,898 52,036
Other costs of materials (1,276) (1,184) 5,510
Cost of materials 106,743 104,141 134,377
Direct operating expenses (exclusive of depreciation and amortization and turnaround expenses) 237,336 213,736 233,138
Turnaround expenses 16,722 486 1,778
Depreciation and amortization 81,867 88,096 79,720
Selling, general and administrative expenses 33,594 28,414 29,523
Interest expense 35,837 34,044 34,317
Other segment items 769 (276) 1,855
Net income 98,662 60,900 172,433
Capital expenditures $ 56,923 $ 37,063 $ 29,081