Subsequent Events (Details) (USD $)				3 Months Ended	9 Months Ended	3 Months Ended			9 Months Ended	0 Months Ended	3 Months Ended
	Oct. 29, 2014 Subsequent Event [Member]	Oct. 29, 2014 Subsequent Event [Member] Minimum [Member]	Oct. 29, 2014 Subsequent Event [Member] Maximum [Member]	Sep. 30, 2014 Handy-Size Vessels And Integrated Barge And Tug Unit [Member]	Sep. 30, 2014 Handy-Size Vessels And Integrated Barge And Tug Unit [Member]	Dec. 31, 2014 Handy-Size Vessels And Integrated Barge And Tug Unit [Member] Scenario, Forecast [Member] Minimum [Member]	Dec. 31, 2014 Handy-Size Vessels And Integrated Barge And Tug Unit [Member] Scenario, Forecast [Member] Maximum [Member]	Sep. 30, 2014 Tanker [Member]	Sep. 30, 2014 Tanker [Member]	Nov. 14, 2014 Tanker [Member] Scenario, Forecast [Member]	Dec. 31, 2014 Tanker [Member] Scenario, Forecast [Member]
Subsequent Event [Line Items]
Approximate amount in net proceeds that could be generated after retiring debt		$ 18,000,000	$ 20,000,000
Approximate amount of debt retired	42,000,000
Impairment loss				0	0	25,000,000	30,000,000	0	0		3,100,000
Approximate proceeds from sale of other assets										$ 1,600,000