Annual report pursuant to Section 13 and 15(d)

Operating Leases Major Classes of Property and Equipment Earning Lease Revenues (Details)

v3.19.3.a.u2
Operating Leases Major Classes of Property and Equipment Earning Lease Revenues (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Major Classes of Property and Equipment Earning Lease Revenues [Line Items]      
Historical cost $ 1,442,382 $ 1,407,329 $ 1,380,469
Accumulated depreciation (624,024) (560,819) (502,544)
Net property and equipment 818,358 $ 846,510 $ 877,925
Property Subject to Operating Lease      
Major Classes of Property and Equipment Earning Lease Revenues [Line Items]      
Historical cost 685,531    
Accumulated depreciation (295,185)    
Net property and equipment 390,346    
Ocean Services | Property Subject to Operating Lease      
Major Classes of Property and Equipment Earning Lease Revenues [Line Items]      
Historical cost 634,916    
Accumulated depreciation (291,687)    
Net property and equipment 343,229    
Ocean Services | Property Subject to Operating Lease | Petroleum and Chemical Carriers - U.S.-flag      
Major Classes of Property and Equipment Earning Lease Revenues [Line Items]      
Historical cost 544,549    
Accumulated depreciation (258,153)    
Net property and equipment 286,396    
Ocean Services | Property Subject to Operating Lease | Harbor and Offshore Tugs - U.S.-flag & foreign-flag      
Major Classes of Property and Equipment Earning Lease Revenues [Line Items]      
Historical cost 51,129    
Accumulated depreciation (17,363)    
Net property and equipment 33,766    
Ocean Services | Property Subject to Operating Lease | Ocean liquid tank barges - U.S.-flag      
Major Classes of Property and Equipment Earning Lease Revenues [Line Items]      
Historical cost 39,238    
Accumulated depreciation (16,171)    
Net property and equipment 23,067    
Inland Services | Property Subject to Operating Lease | Inland River Towboats      
Major Classes of Property and Equipment Earning Lease Revenues [Line Items]      
Historical cost 50,615    
Accumulated depreciation (3,498)    
Net property and equipment $ 47,117