Goodwill And Other Intangible Assets (Narrative) (Details) (USD $)	3 Months Ended			9 Months Ended
	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Goodwill And Other Intangible Assets [Line Items]
Additions		$ 71,000
Intangible assets related to the favorable early buy-out to the new cost basis of the tug/barge unit, reclassified	11,328,000			11,328,000
Amortization expense	1,500,000		643,875	4,669,000	1,932,000
Favorable Lease [Member] | UOS EBO Acquisition [Member]
Goodwill And Other Intangible Assets [Line Items]
Intangible assets related to the favorable early buy-out to the new cost basis of the tug/barge unit, reclassified	$ 11,328,000			$ 11,328,000