Derivative Instruments (Notional And Fair Value Of Derivative Instruments) (Details)	9 Months Ended
	Sep. 30, 2013 USD ($)		Sep. 30, 2013 JPY (¥)	Sep. 30, 2013 Other Liabilities [Member] Interest Rate Swap - LT [Member] USD ($)		Sep. 30, 2013 Other Current Assets [Member] Foreign Exchange Contracts [Member] USD ($)	Sep. 30, 2013 Other Assets [Member] Foreign Exchange Contracts [Member] USD ($)	Sep. 30, 2013 Current Liabilities [Member] Foreign Exchange Contracts [Member] USD ($)	Sep. 30, 2013 Oslo Bulk AS [Member] USD ($)	Jul. 31, 2011 Oslo Bulk AS [Member]
Derivatives, Fair Value [Line Items]
Asset derivatives, current notional amount						$ 300,000	$ 1,200,000
Liability derivatives, current notional amount				51,140,000	[1]			2,400,000
Derivatives, current notional amount	55,040,000
Asset derivatives, fair value	55,000					34,000	21,000
Liability derivatives, fair value	(4,576,000)			(4,239,000)	[1]			(337,000)
Notional amount under contract	51,140,065	[2]
Exchange rate			98.24
Original funding of vessel's delivery cost (in hundredths)	80.00%
Revised funding of vessel's delivery cost (in hundredths)	65.00%
Reduction in funding of vessel's delivery cost (in hundredths)	15.00%
Change in fair value related to ineffective portion of derivative instrument, loss	17,000
Negative balance related to an interest rate swap in Oslo Bulk AS									$ (717,151)
Equity investee ownership interest (in hundredths)									25.00%	25.00%

[1] We have outstanding a variable-to-fixed interest rate swap with respect to a Yen-based facility for the financing of a PCTC delivered in March 2010. The notional amount under this contract is $51,140,065 (based on a Yen to USD exchange rate of 98.24 as of September 30, 2013). With the bank exercising its option to reduce the underlying Yen loan from 80% to 65% funding of the vessel’s delivery cost, the 15% reduction represents the ineffective portion of this swap, which consists of the portion of the derivative instrument that is no longer supported by underlying borrowings. The change in fair value related to the ineffective portion of this swap was a $17,000 loss for the quarter ended September 30, 2013 and this amount was reflected in earnings. The fair value balance as of September 30, 2013, includes a negative $717,151 balance related to an interest rate swap from our 25% investment in Oslo Bulk AS.

[2] Notional amount converted from Yen at September 30, 2013 at a Yen to USD exchange rate of 98.24