Trustee Taxes and Accrued Expenses and Other Current Liabilities (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Trustee Taxes and Accrued Expenses and Other Current Liabilities
Barging transportation, product storage and other ancillary costs	$ 47,837,000	$ 25,302,000
Swaps and other derivatives	54,000	122,000
Employee compensation	13,716,000	11,212,000
Other	9,835,000	4,671,000
Total	71,442,000	41,307,000
Taxes payable
Trustee taxes payable	91,494,000	76,523,000
Trustee taxes payable related to an ethanol credit	56,300,000	57,200,000
Various pass-through taxes collected from customers on behalf of taxing authorities	$ 35,200,000	$ 19,300,000