USD ($) | USD ($) | USD ($) | US$ 210 million secured term loan facility [Member] | US$ 210 million secured term loan facility [Member] | US$ 210 million secured term loan facility [Member] | US$ 149 million secured term loan facility [Member] | US$ 149 million secured term loan facility [Member] | US$ 149 million secured term loan facility [Member] | US$ 149 million secured term loan facility [Member] | US$ 149 million secured term loan facility [Member] | US dollar 77 million secured term loan facility [Member] | US dollar 77 million secured term loan facility [Member] | US dollar 77 million secured term loan facility [Member] | US dollar 77 million secured term loan facility [Member] | US$ 30 million secured revolving credit facility (February 2008) [Member] | US$ 30 million secured revolving credit facility (February 2008) [Member] | US$ 30 million secured revolving credit facility (February 2008) [Member] | US$ 30 million secured revolving credit facility (February 2008) [Member] | US$ 49 million secured term loan and revolving credit facility [Member] | US$ 49 million secured term loan and revolving credit facility [Member] | US$ 49 million secured term loan and revolving credit facility [Member] | US$ 43 million secured term loan facility (February 2010) [Member] | US$ 43 million secured term loan facility (February 2010) [Member] | US$ 43 million secured term loan facility (February 2010) [Member] | US$ 725 million secured term loan and revolving credit facility [Member] | US$ 725 million secured term loan and revolving credit facility [Member] | US$ 725 million secured term loan and revolving credit facility [Member] | US$ 43 million secured term loan facility (March 2010) [Member] | US$ 43 million secured term loan facility (March 2010) [Member] | US$ 43 million secured term loan facility (March 2010) [Member] | US$ 54 million secured term loan facility [Member] | US$ 54 million secured term loan facility [Member] | US$ 54 million secured term loan facility [Member] | US$ 95 million secured term loan and revolving credit facility [Member] | US$ 95 million secured term loan and revolving credit facility [Member] | US$ 95 million secured term loan and revolving credit facility [Member] | US$ 75 million secured term loan facility [Member] | US$ 75 million secured term loan facility [Member] | US$ 75 million secured term loan facility [Member] | US$ 75 million secured term loan facility [Member] | US$ 75 million secured term loan facility [Member] | US$ 171 million secured term loan facility [Member] | US$ 171 million secured term loan facility [Member] | US$ 171 million secured term loan facility [Member] | US$ 55 million secured securities financing facility [Member] | US$ 55 million secured securities financing facility [Member] | US$ 55 million secured securities financing facility [Member] | US$ 167 million secured term loan facility | US$ 167 million secured term loan facility | US$ 167 million secured term loan facility | US dollar 184 million secured term loan and revolving credit facility [Member] | US dollar 184 million secured term loan and revolving credit facility [Member] | US dollar 184 million secured term loan and revolving credit facility [Member] | US dollar 184 million secured term loan and revolving credit facility [Member] | US dollar 184 million secured term loan and revolving credit facility [Member] | US Dollar 53.2 Million Secured Term Loan Facility [Member] | US Dollar 53.2 Million Secured Term Loan Facility [Member] | US Dollar 53.2 Million Secured Term Loan Facility [Member] | US Dollar 70 Million Secured Term Loan Facility [Member] | US Dollar 70 Million Secured Term Loan Facility [Member] | US Dollar 70 Million Secured Term Loan Facility [Member] | US Dollar 45 million Secured Term Loan Facility [Member] | US Dollar 45 million Secured Term Loan Facility [Member] | 8.5% Senior Notes due 2013 [Member] | 8.5% Senior Notes due 2013 [Member] | US dollar 350 Million Senior Unsecured Convertible Bonds Due 2018 [Member] | US dollar 350 Million Senior Unsecured Convertible Bonds Due 2018 [Member] | US dollar 350 Million Senior Unsecured Convertible Bonds Due 2018 [Member] | US dollar 350 Million Senior Unsecured Convertible Bonds Due 2018 [Member] | NOK 500 million senior unsecured floating rate bonds due 2014 [Member] | NOK 500 million senior unsecured floating rate bonds due 2014 [Member] | NOK 500 million senior unsecured floating rate bonds due 2014 [Member] | NOK 500 million senior unsecured floating rate bonds due 2014 [Member] | NOK 500 million senior unsecured floating rate bonds due 2014 [Member] | NOK 500 Million Senior Unsecured Floating Rate Bonds Due 2014 (USD) [Member] | NOK 500 Million Senior Unsecured Floating Rate Bonds Due 2014 (USD) [Member] | 3.75% Senior Unsecured Convertible Bonds Due 2016 [Member] | 3.75% Senior Unsecured Convertible Bonds Due 2016 [Member] | 3.75% Senior Unsecured Convertible Bonds Due 2016 [Member] | 3.75% Senior Unsecured Convertible Bonds Due 2016 [Member] | NOK 600 million senior unsecured floating rate bonds due 2017 [Member] | NOK 600 million senior unsecured floating rate bonds due 2017 [Member] | NOK 600 million senior unsecured floating rate bonds due 2017 [Member] | NOK 600 million senior unsecured floating rate bonds due 2017 [Member] | NOK 600 million senior unsecured floating rate bonds due 2017 [Member] | NOK 600 million senior unsecured floating rate bonds due 2017 [Member] | NOK 600 Million Senior Unsecured Floating Rate Bonds Due 2017 (USD) [Member] | NOK 600 Million Senior Unsecured Floating Rate Bonds Due 2017 (USD) [Member] | Senior Unsecured Convertible Bonds Due 2018 [Member] | Senior Unsecured Convertible Bonds Due 2018 [Member] | NOK 900 million senior unsecured floating rate bonds due 2019 [Member] | NOK 900 million senior unsecured floating rate bonds due 2019 [Member] | NOK 900 million senior unsecured floating rate bonds due 2019 [Member] | NOK 900 million senior unsecured floating rate bonds due 2019 [Member] | NOK 900 million senior unsecured floating rate bonds due 2019 [Member] | NOK 900 million senior unsecured floating rate bonds due 2019 [Member] | NOK 900 million senior unsecured floating rate bonds due 2019 (USD) [Member] | NOK 900 million senior unsecured floating rate bonds due 2019 (USD) [Member] | USD denominated floating rate debt (libor plus margin) due through 2026 [Member] | USD denominated floating rate debt (libor plus margin) due through 2026 [Member] | SFL Linus [Member] | SFL Linus [Member] |