CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Assets
Cash	$ 266	$ 11,380
Accounts and other receivables, less allowance for doubtful accounts of $3,021 and $2,528, respectively	126,461	95,276
Product exchange receivables	17,646	9,099
Inventories	78,163	52,616
Due from affiliates	5,968	6,437
Fair value of derivatives	622	2,142
Other current assets	1,978	2,784
Total current assets	231,104	179,734
Property, plant and equipment, at cost	711,052	632,456
Accumulated depreciation	(233,710)	(200,276)
Property, plant and equipment, net	477,342	432,180
Goodwill	37,268	37,268
Investment in unconsolidated entities	170,497	98,217
Debt issuance costs, net	13,330	13,497
Other assets	19,568	24,582
Total Assets	949,109	785,478
Liabilities and Partners' Capital
Current installments of long-term debt and capital lease obligations	1,261	1,121
Trade and other accounts payable	125,970	82,837
Product exchange payables	37,313	22,353
Due to affiliates	18,485	6,957
Income taxes payable	893	811
Fair value of derivatives	362	282
Other accrued liabilities	11,022	10,034
Total current liabilities	195,306	124,395
Long-term debt and capital leases, less current maturities	458,941	372,862
Deferred income taxes	7,657	8,213
Fair value of derivatives	0	4,100
Other long-term obligations	1,589	1,102
Total liabilities	663,493	510,672
Partners' capital	284,990	273,387
Accumulated other comprehensive loss	626	1,419
Total partners' capital	285,616	274,806
Commitments and contingencies
Total Liabilities and Parners' Capital	$ 949,109	$ 785,478