v3.26.1
Note 8 - Debt (Details Textual) - USD ($)
$ in Thousands
3 Months Ended
Feb. 09, 2026
Mar. 31, 2026
Dec. 31, 2025
May 20, 2022
Extinguishment of Debt, Gain (Loss), Net of Tax   $ (1,000)    
Debt Issuance Costs, Net   7,000 $ 7,000  
Long-Term Debt, Excluding Current Maturities   $ 1,680,000 1,658,000  
Arabian Amines Company [Member]        
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage   50.00%    
Long-Term Debt, Excluding Current Maturities   $ 5,000    
Huntsman International LLC [Member]        
Extinguishment of Debt, Gain (Loss), Net of Tax   (1,000)    
Long-Term Debt, Excluding Current Maturities   1,680,000 1,658,000  
The Revolving Credit Facility [Member] | Letter of Credit [Member]        
Long-Term Line of Credit   $ 3    
The Revolving Credit Facility [Member] | Term Secured Overnight Financing Rate (Term SOFR) [Member]        
Debt Instrument, Basis Spread on Variable Rate   1.75%    
The Revolving Credit Facility [Member] | EURIBOR Rate [Member]        
Debt Instrument, Basis Spread on Variable Rate   1.75%    
The Revolving Credit Facility [Member] | Huntsman International LLC [Member]        
Line of Credit Facility, Maximum Borrowing Capacity $ 800,000 $ 800,000   $ 1,200,000
Line Of Credit Facility, Contingent Increase, Additional Borrowing Capacity $ 400,000      
Extinguishment of Debt, Gain (Loss), Net of Tax   (1,000)    
Debt Issuance Costs, Net   5,000    
US A/R Program [Member] | Huntsman International LLC [Member]        
Letters of Credit Outstanding, Amount   5,000    
Accounts Receivable Programs [Member] | Huntsman International LLC [Member] | Asset Pledged as Collateral [Member]        
Accounts Receivable, after Allowance for Credit Loss   $ 331,000 $ 281,000