SEVERANCE AND RELOCATION COSTS AND AGREEMENTS WITH EXECUTIVE OFFICERS	12 Months Ended
	Dec. 31, 2012
Restructuring and Related Activities [Abstract]
Restructuring and Related Activities Disclosure [Text Block]	NOTE 20 —SEVERANCE AND RELOCATION COSTS AND AGREEMENTS WITH EXECUTIVE OFFICERS: In the first quarter of 2012, the Company announced the relocation of the technical management of its conventional International Flag crude oil tanker fleet from its Newcastle, U.K. office to its Athens, Greece office. In connection therewith, approximately 50 employees were terminated in Newcastle. The Company recognized severance and relocation related costs totaling $3,163 in the year ended December 31, 2012 related to such terminations and transfer of vessel management. On June 15, 2012, the Company entered into agreements with the Company’s then-current Chief Financial Officer and the Head of U.S. Strategic Business unit, to pay each executive officer a lump sum retention bonus of $1,500 in order to encourage their continued employment through to June 30, 2014. Each executive officer is responsible to repay the full gross amount of the retention bonus to the Company within thirty days if they are terminated by the Company for cause or resign without good reason, as defined within the agreements. On October 12, 2011, OSG and its former Chief Executive Officer entered into two agreements. One agreement replaced the employment letter agreement dated as of January 19, 2004, as amended, and extended the time period from January 19, 2012 to October 12, 2016 for certain protection in the event of termination of employment without cause or for good reason. The other agreement amended the change of control agreement dated as of December 31, 2008, to extend its term to end on the earliest to occur of three events, one of which is a fixed date, which the letter agreement extended from January 19, 2012, to October 12, 2016. In connection with entering into the above agreements, on October 12, 2011, OSG granted to its former Chief Executive Officer premium priced stock options for 450,000 shares of common stock at an exercise price of $22.50 per share and 177,778 performance based restricted stock units that contain vesting conditions. See Note 24, “Subsequent Events,” for additional information on resignations and terminations of executive officers subsequent to December 31, 2012.

The entire disclosure for restructuring and related activities. Description of restructuring activities such as exit and disposal activities, include facts and circumstances leading to the plan, the expected plan completion date, the major types of costs associated with the plan activities, total expected costs, the accrual balance at the end of the period, and the periods over which the remaining accrual will be settled.

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