XML 94 R57.htm IDEA: XBRL DOCUMENT v3.8.0.1
Property, plant and equipment (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
USD ($)
vessel
Dec. 31, 2016
USD ($)
Reconciliation of changes in property, plant and equipment [abstract]    
Value at beginning of period $ 3,117,469  
Value at end of period $ 2,998,326 $ 3,117,469
Number of finance lease vessels | vessel 2  
Buildings, plant installations and machinery    
Reconciliation of changes in property, plant and equipment [abstract]    
Value at beginning of period $ 2,797,276  
Value at end of period 2,692,607 2,797,276
Finance leases    
Reconciliation of changes in property, plant and equipment [abstract]    
Value at beginning of period 187,703  
Value at end of period 181,846 187,703
Other    
Reconciliation of changes in property, plant and equipment [abstract]    
Value at beginning of period 132,490  
Value at end of period $ 123,873 132,490
Ocean going vessels    
Reconciliation of changes in property, plant and equipment [abstract]    
Number of finance lease vessels | vessel 2  
Cost    
Reconciliation of changes in property, plant and equipment [abstract]    
Value at beginning of period $ 5,028,954 4,848,167
Additions 111,448 197,747
Disposals and other 212 16,960
Value at end of period 5,140,190 5,028,954
Cost | Buildings, plant installations and machinery    
Reconciliation of changes in property, plant and equipment [abstract]    
Value at beginning of period 4,549,816 4,521,835
Additions 98,780 35,644
Disposals and other (328) 7,663
Value at end of period 4,648,924 4,549,816
Cost | Finance leases    
Reconciliation of changes in property, plant and equipment [abstract]    
Value at beginning of period 206,260 121,849
Additions 7,667 87,800
Disposals and other (1,846) 3,389
Value at end of period 215,773 206,260
Cost | Other    
Reconciliation of changes in property, plant and equipment [abstract]    
Value at beginning of period 272,878 204,483
Additions 5,001 74,303
Disposals and other 2,386 5,908
Value at end of period 275,493 272,878
Accumulated depreciation    
Reconciliation of changes in property, plant and equipment [abstract]    
Value at beginning of period (1,911,485) (1,689,385)
Disposals and other (2,739) (6,853)
Depreciation 233,118 228,953
Value at end of period (2,141,864) (1,911,485)
Accumulated depreciation | Buildings, plant installations and machinery    
Reconciliation of changes in property, plant and equipment [abstract]    
Value at beginning of period (1,752,540) (1,545,834)
Disposals and other (2,066) (945)
Depreciation 205,843 207,651
Value at end of period (1,956,317) (1,752,540)
Accumulated depreciation | Finance leases    
Reconciliation of changes in property, plant and equipment [abstract]    
Value at beginning of period (18,557) (6,853)
Disposals and other 0 0
Depreciation 15,370 11,704
Value at end of period (33,927) (18,557)
Accumulated depreciation | Other    
Reconciliation of changes in property, plant and equipment [abstract]    
Value at beginning of period (140,388) (136,698)
Disposals and other (673) (5,908)
Depreciation 11,905 9,598
Value at end of period $ (151,620) $ (140,388)