Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Includes, but is not limited to, one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and termination benefits associated with an ongoing benefit arrangement. Excludes expenses associated with special or contractual termination benefits, a discontinued operation or an asset retirement obligation.

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Amount of expenses for special or contractual termination benefits provided to current employees involuntarily terminated under a benefit arrangement associated exit or disposal activities pursuant to an authorized plan. Excludes expenses related to one-time termination benefits, a discontinued operation or an asset retirement obligation.

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Severance Costs (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Restructuring Cost and Reserve [Line Items]
Severance Costs	$ 5us-gaap_SeveranceCosts1	$ 6,683us-gaap_SeveranceCosts1	$ 17,020us-gaap_SeveranceCosts1
Business Exit Costs		194us-gaap_BusinessExitCosts1
International Crude Tankers Segment [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs		1,427
Business Exit Costs		90
International Product Carriers Segment [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs		2,716
Business Exit Costs		$ 60