Out of Period Adjustments	12 Months Ended
Dec. 31, 2012
Out of Period Adjustments [Abstract]
Out of Period Adjustments	NOTE C- Out of Period Adjustments In July of 2011, Oslo Bulk AS ("Oslo"), an entity in which we hold a 25% equity interest and account for under the equity method, entered into an interest rate swap to reduce its exposure to variable interest rates on its outstanding debt. We incorrectly accounted for the derivative by reporting our 25% share of the change in fair value of the derivative in the condensed consolidated statements of income under the caption "Equity in Net (Loss) Income of Unconsolidated Entities" from inception of the swap to December 31, 2011, rather than accounting for the change in fair value as a component of comprehensive income. The change in fair value recorded in the third and fourth quarters of 2011 resulted in an aggregate loss of approximately $674,000. As a result of this error, we recorded an out of period ("OOP") adjustment during the three months ended June 30, 2012 to correct the $674,000 aggregate loss that was previously recorded in 2011, and $42,000 that was previously recorded in the first quarter of 2012. The correction of these amounts was recorded in "Other Comprehensive Income". We also recorded a $324,000 negative OOP adjustment related to net charter revenues that were not previously recorded on a straight-line basis in prior periods from 1999 to 2011, and a $239,000 positive OOP adjustment related to the termination of a lease on one of our PCTC vessels in the third quarter of 2011. The net impact of these OOP adjustments was an $85,000 decrease to pre-tax income and a $631,000 increase to net income. We evaluated the impact of the OOP adjustments on the results of our previously issued financial statements for each of the periods affected and concluded that the impact was not material. We also evaluated the impact of correcting the cumulative effect of the OOP adjustments in the current year and concluded that the impact is not material to our results for 2012. Accordingly, a net adjustment of $631,000 was recorded to correct the OOP errors in the three month period ended June 30, 2012.

NOTE C- Out of Period Adjustments

In July of 2011, Oslo Bulk AS ("Oslo"), an entity in which we hold a 25% equity interest and account for under the equity method, entered into an interest rate swap to reduce its exposure to variable interest rates on its outstanding debt. We incorrectly accounted for the derivative by reporting our 25% share of the change in fair value of the derivative in the condensed consolidated statements of income under the caption "Equity in Net (Loss) Income of Unconsolidated Entities" from inception of the swap to December 31, 2011, rather than accounting for the change in fair value as a component of comprehensive income. The change in fair value recorded in the third and fourth quarters of 2011 resulted in an aggregate loss of approximately $674,000. As a result of this error, we recorded an out of period ("OOP") adjustment during the three months ended June 30, 2012 to correct the $674,000 aggregate loss that was previously recorded in 2011, and $42,000 that was previously recorded in the first quarter of 2012. The correction of these amounts was recorded in "Other Comprehensive Income". We also recorded a $324,000 negative OOP adjustment related to net charter revenues that were not previously recorded on a straight-line basis in prior periods from 1999 to 2011, and a $239,000 positive OOP adjustment related to the termination of a lease on one of our PCTC vessels in the third quarter of 2011. The net impact of these OOP adjustments was an $85,000 decrease to pre-tax income and a $631,000 increase to net income. We evaluated the impact of the OOP adjustments on the results of our previously issued financial statements for each of the periods affected and concluded that the impact was not material. We also evaluated the impact of correcting the cumulative effect of the OOP adjustments in the current year and concluded that the impact is not material to our results for 2012. Accordingly, a net adjustment of $631,000 was recorded to correct the OOP errors in the three month period ended June 30, 2012.