Chapter 11 Filing and Emergence from Bankruptcy (Details Textual) (USD $) In Thousands, except Share data, unless otherwise specified	1 Months Ended	3 Months Ended			9 Months Ended													9 Months Ended			9 Months Ended			9 Months Ended				1 Months Ended			9 Months Ended						3 Months Ended	9 Months Ended				9 Months Ended
	May 02, 2014	Sep. 30, 2014		Sep. 30, 2013	Sep. 30, 2014		Sep. 30, 2013	Aug. 04, 2014	Dec. 31, 2013		Sep. 30, 2014 Euronav Nv Joint Venture [Member]	Sep. 30, 2014 Common Class A [Member]	Sep. 30, 2014 Common Class B [Member]	Sep. 30, 2014 Election 2 Noteholders [Member]	Sep. 30, 2014 Amended And Restated Certificate [Member]	Sep. 30, 2014 Amended And Restated Certificate [Member] Common Class A [Member]	Sep. 30, 2014 Amended And Restated Certificate [Member] Common Class B [Member]	Sep. 30, 2014 Notes 7.50% Due 2024 [Member]	Dec. 31, 2013 Notes 7.50% Due 2024 [Member]		Sep. 30, 2014 Notes 8.125% Due 2018 [Member]	Dec. 31, 2013 Notes 8.125% Due 2018 [Member]		Sep. 30, 2014 Notes 7.50% Due 2021 [Member]	Sep. 30, 2014 Notes 7.50% Due 2021 [Member] Election 2 Noteholders [Member]	Sep. 30, 2014 Notes 7.50% Due 2021 [Member] Election 1 Noteholder [Member]	Sep. 30, 2014 Unsecured Senior Notes [Member]	Mar. 07, 2014 Reorganized OSG Stock [Member]	Sep. 30, 2014 Preferred Stock [Member] Amended And Restated Certificate [Member]	Sep. 30, 2014 Class A Warrant [Member]	Sep. 30, 2014 Class A Warrant [Member] Common Class A [Member]	Sep. 30, 2014 Class B Warrant [Member]	Sep. 30, 2014 Secured Debt [Member]	Sep. 30, 2014 Term Loan [Member]	Sep. 30, 2014 Term loan 1 [Member]	Sep. 30, 2014 Asset Based Revolving Loan [Member]	Sep. 30, 2014 Revolving Credit Facility [Member]	Sep. 30, 2014 Revolving Credit Facility [Member]	Sep. 30, 2014 Third Supplemental Indenture [Member]	Sep. 30, 2014 Third Supplemental Indenture [Member] Notes 7.50% Due 2024 [Member] Election 2 Noteholders [Member]	Sep. 30, 2014 Third Supplemental Indenture [Member] Notes 7.50% Due 2024 [Member] Election 1 Noteholder [Member]	Sep. 30, 2014 Rights [Member]
Chapter 11 Filing Going Concern and Other Related Matters [Line Items]
Debt Instrument, Interest Rate, Stated Percentage														7.50%				7.50%			8.125%			7.50%
Debt Instrument Maturity Year																		2024						2021
Bankruptcy Claims, Amount of Claims Settled		$ 15,000			$ 15,000				$ 14,429
Equity Method Investment, Ownership Percentage											50.00%
Stock Issued During Period, Value, New Issues	1,510,000				1,510,000
Secured Long-term Debt, Noncurrent																																	603,000	628,375	50,000	75,000
Percentage of Cash payment on Principal Amount																																								3.00%	1.00%
Bankruptcy Claims, Amount of Claims Filed																												1,500,000									1,500,000	1,500,000
Common Stock, Shares, Issued												306,857,778	4,377,317		1,067,926,805	1,000,000,000	7,926,805												60,000,000
Common Stock, Par or Stated Value Per Share		$ 1	[1]		$ 1	[1]		$ 1				$ 0.01	$ 0.01			$ 0.01	$ 0.01												$ 0.01
Development Stage Entities, Equity Issuance, Per Share Amount																																										$ 3.00
Stock Issued During Period, Shares, New Issues																															25,166,668
Warrant Issued																														213,715,419		2,469,013
Debt Instrument, Annual Principal Payment																									138,708,000	6,508,000													784,000
Debt Instrument, Maturity Date																		Feb. 15, 2024			Mar. 30, 2018																		Feb. 15, 2021
Long-term Debt, Gross									2,909
Increase Decrease In Adequate Payment					12,731	[2]
Accounts Payable and Other Accrued Liabilities, Current		123,675			123,675				121,582																		16,231
Long-term Debt		1,671,381			1,671,381				2,564,559	[3],[4]								146,000	146,000	[3],[4]	300,000	300,000	[3],[4]				446,000
Other Liabilities		11,882			11,882
Service Fee Amount Paid		3,834		3,537	12,731		11,301
Cash Paid for Reorganization Items		$ 355,692		$ 12,276	$ 403,000		$ 38,308

[1] Par value $1 per share; 120,000,000 shares authorized; 44,290,759 shares outstanding as of August 4, 2014 cancelled as of August 5, 2014; Par value $0.01 per share; 1,000,000,000 Class A shares authorized; 310,744,763 Class A shares issued as of September 30, 2014; and Par value $0.01 per share; 7,926,805 Class B shares authorized; 4,377,317 Class B shares issued as of September 30, 2014.

[2] OBS and OIN Term Loan balances are net of unamortized original issue discounts as of September 30, 2014 of $1,718 and $1,198, respectively.

[3] Debt at December 31, 2013 was classified as liabilites subject to compromise

[4] Debt (reflects add back of $2,909 of original issue discount) classified as liabilities subject to compromise at December 31, 2013.