Quarterly report pursuant to Section 13 or 15(d)

Commitments And Contingencies (Details)

v3.20.2
Commitments And Contingencies (Details)
$ in Thousands
Jul. 27, 2020
claim
Oct. 16, 2019
claim
Aug. 02, 2016
claim
Feb. 16, 2016
claim
Jun. 30, 2020
USD ($)
equipment
vessel
Loss Contingencies [Line Items]          
Unrecorded unconditional purchase obligation, due in remainder of 2020         $ 23,899
Unrecorded unconditional purchase obligation, due within 2021         31,319
Unrecorded unconditional purchase obligation, due within 2022         2,636
Unrecorded unconditional purchase obligation         57,854
Deepwater Horizon Oil Spill Multi District Litigation          
Loss Contingencies [Line Items]          
Claims dismissed | claim     11 11  
BELO/ORM | Subsequent Event          
Loss Contingencies [Line Items]          
Claims dismissed | claim 760        
Claims filed | claim 2,395        
BELO/NRC | Subsequent Event          
Loss Contingencies [Line Items]          
Claims dismissed | claim 70        
Claims filed | claim 230        
BP counter claims ORM and NRC          
Loss Contingencies [Line Items]          
Claims filed | claim   4      
BP counterclaim ORM insurer          
Loss Contingencies [Line Items]          
Claims filed | claim   2      
Ocean Services          
Loss Contingencies [Line Items]          
Unrecorded unconditional purchase obligation, due in remainder of 2020         18,042
Unrecorded unconditional purchase obligation, due within 2021         30,892
Unrecorded unconditional purchase obligation, due within 2022         2,636
Unrecorded unconditional purchase obligation         $ 51,570
Ocean Services | U.S.-flag - Harbor Tugs          
Loss Contingencies [Line Items]          
Number of equipment committed to purchase | equipment         4
Ocean Services | Foreign-flag Rail Ferries          
Loss Contingencies [Line Items]          
Number of equipment committed to purchase | vessel         2
Inland Services          
Loss Contingencies [Line Items]          
Unrecorded unconditional purchase obligation, due in remainder of 2020         $ 5,525
Unrecorded unconditional purchase obligation, due within 2021         427
Unrecorded unconditional purchase obligation, due within 2022         0
Unrecorded unconditional purchase obligation         $ 5,952
Inland Services | Inland River Dry-Cargo Barges          
Loss Contingencies [Line Items]          
Number of equipment committed to purchase | equipment         6
Inland Services | Inland River Towboat          
Loss Contingencies [Line Items]          
Number of equipment committed to purchase | vessel         1
Other Segment          
Loss Contingencies [Line Items]          
Unrecorded unconditional purchase obligation, due in remainder of 2020         $ 332
Unrecorded unconditional purchase obligation, due within 2021         0
Unrecorded unconditional purchase obligation, due within 2022         0
Unrecorded unconditional purchase obligation         $ 332