Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Condensed Consolidated Balance Sheets
Accumulated amortization, intangibles	$ 146,198	$ 124,568
Accumulated amortization, deferred financing costs	12,839	11,445
Accumulated amortization, deferred contract cost	2,106	1,950
Long-term debt, discounts	1,550	1,566
Common units issued (in units)	75,160	71,440
Common units outstanding (in units)	75,160	71,440
Cash and cash equivalents	95,035	67,450
Receivables, net	188,706	179,209
Inventories	31,396	23,432
Other current assets	7,494	8,020
Property, plant and equipment	2,967,240	2,613,027
Accumulated depreciation	363,398	294,003
Restricted cash	28,100	28,001
Other long-term assets	1,771	1,486
Accounts payable	152,623	122,473
Accrued liabilities	135,763	153,869
Other long-term liabilities	115,798	105,349
Total Variable Interest Entity
Condensed Consolidated Balance Sheets
Cash and cash equivalents	22,863	2,913
Receivables, net	12,639	43,783
Inventories	12,511	8,431
Other current assets	746	272
Property, plant and equipment	1,011,845	849,986
Accumulated depreciation	56,369	38,169
Restricted cash	28,100	28,001
Other long-term assets	370	383
Accounts payable	14,567	5,945
Accrued liabilities	49,078	64,713
Other long-term liabilities	$ 161	$ 154