v3.26.1
Acquisitions (Details)
$ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended
Mar. 17, 2026
USD ($)
Barge
Barrels
Towboat
Oct. 14, 2025
USD ($)
Aug. 07, 2025
USD ($)
Barge
Towboat
Mar. 27, 2025
USD ($)
Barrels
Barge
Towboat
Mar. 31, 2026
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Restructuring Cost and Reserve [Line Items]                
Cash paid for acquisition   $ 9,300         $ 119,764 $ 150,160
Equipment Purchase Agreement [Member]                
Restructuring Cost and Reserve [Line Items]                
Cash paid for acquisition     $ 9,200 $ 97,300 $ 81,400 $ 14,400    
Acquisition cost incurred $ 95,800              
High Horsepower Towboats [Member] | Equipment Purchase Agreement [Member]                
Restructuring Cost and Reserve [Line Items]                
Number of horsepower towboats | Towboat 3     4        
Towboats [Member] | Equipment Purchase Agreement [Member]                
Restructuring Cost and Reserve [Line Items]                
Number of towboats | Towboat     1          
Inland Tank Barges [Member] | Equipment Purchase Agreement [Member]                
Restructuring Cost and Reserve [Line Items]                
Number of tank barges | Barge 23   2 14        
Total capacity of barrels | Barrels 653,000     364,000        
Average age 19 years     16 years        
Specialty Barges [Member] | Equipment Purchase Agreement [Member]                
Restructuring Cost and Reserve [Line Items]                
Number of tank barges | Barge 5     4