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Variable Interest Entities (VIEs) - Summary of Bareboat Charter Rates per Day Based on Base LIBOR Interest Rate for Next Five Years (Detail)
$ / d in Thousands
Jun. 30, 2018
$ / d
West Taurus [Member]  
Sale Leaseback Transaction [Line Items]  
2018 112
2019 103
2020 101
2021 97
2022 96
2023 181
SFL Hercules Limited [Member]  
Sale Leaseback Transaction [Line Items]  
2018 118
2019 101
2020 100
2021 96
2022 96
2023 184
SFL Linus Limited [Member]  
Sale Leaseback Transaction [Line Items]  
2018 158
2019 122
2020 99
2021 99
2022 93
2023 189