Accumulated Other Comprehensive Loss (Changes In Accumulated Other Comprehensive Income By Component) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2013 Gains And Losses On Derivatives Fair Value [Member]		Dec. 31, 2012 Gains And Losses On Derivatives Fair Value [Member]		Dec. 31, 2013 Unrealized Translation Loss [Member]	Dec. 31, 2012 Unrealized Translation Loss [Member]	Dec. 31, 2013 Defined Benefit Pension Items [Member]	Dec. 31, 2012 Defined Benefit Pension Items [Member]	Dec. 31, 2012 Bonds Adjuster For Market Value [Member]	Dec. 31, 2013 Oslo Bulk AS [Member]	Dec. 31, 2012 Oslo Bulk AS [Member]	Jul. 31, 2011 Oslo Bulk AS [Member]	Dec. 31, 2009 Oslo Bulk AS [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Beginning Balance	$ (24,946)	$ (23,947)	$ (7,352)	[1],[2]	$ (8,595)	[1]	$ (350)	$ (445)	$ (17,244)	$ (15,035)	$ 128
Other comprehensive (loss) income before reclassification	11,913	1,808	5,300	[2]	5,014	[1]	(64)	95	6,677	(3,173)	(128)
Amount reclassified from accumulated other comprehensive income	(877)	(2,807)	(2,227)	[2]	(3,771)	[1]			1,350	964
Net current-period other comprehensive income	11,036	(999)	3,073	[2]	1,243	[1]	(64)	95	8,027	(2,209)	(128)
Accumulated Other Comprehensive Income (Loss), Ending Balance	(13,910)	(24,946)	(4,279)	[2]	(7,352)	[1],[2]	(414)	(350)	(9,217)	(17,244)
Interest rate swap fair value												$ (659)	$ (1,000)
Ownership percentage (in hundredths)												25.00%	25.00%	25.00%	25.00%

[1] The fair value balance as of December 31, 2012, includes a negative $1.0 million balance related to an interest rate swap from our 25% investment in Oslo Bulk AS.

[2] The fair value balance as of December 31, 2013, includes a negative $659,000 balance related to an interest rate swap from our 25% investment in Oslo Bulk AS.