Changes In Accumulated Other Comprehensive Income (Changes In Accumulated Other Comprehensive Income By Component) (Details) (USD $)	3 Months Ended	9 Months Ended	3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Sep. 30, 2013 Gains And Losses On Derivatives Fair Value [Member]		Sep. 30, 2013 Gains And Losses On Derivatives Fair Value [Member]		Sep. 30, 2013 Unrealized Translation Loss [Member]	Sep. 30, 2013 Unrealized Translation Loss [Member]	Sep. 30, 2013 Defined Benefit Pension Items [Member]	Sep. 30, 2013 Defined Benefit Pension Items [Member]	Sep. 30, 2013 Oslo Bulk AS [Member]	Jul. 31, 2011 Oslo Bulk AS [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 22,571,000	$ 24,946,000	$ 5,844,000	[1]	$ 7,352,000	[1]	$ 104,000	$ 350,000	$ 16,623,000	$ 17,244,000
Other comprehensive (loss) income before reclassification	(2,968,000)	(4,009,000)	(3,275,000)	[1]	(4,070,000)	[1]	307,000	61,000
Amount reclassified from accumulated other comprehensive income	2,189,000	854,000	2,495,000	[1]	1,781,000	[1]			(306,000)	(927,000)
Net current-period other comprehensive income	(779,000)	(3,156,000)	(780,000)	[1]	(2,289,000)	[1]	307,000	61,000	(306,000)	(927,000)
Ending balance	21,792,000	21,792,000	5,064,000	[1]	5,064,000	[1]	411,000	411,000	16,317,000	16,317,000
Interest rate swap fair value											$ (717,151)
Equity investee ownership interest (in hundredths)											25.00%	25.00%

[1] 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.