Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Cash and cash equivalents	$ 123,481	$ 85,305
Receivables, net	283,249	299,107
Inventories	47,666	41,363
Other current assets	42,146	44,068
Property, plant and equipment	9,223,296	8,583,767
Accumulated depreciation	992,101	890,598
Accumulated amortization, intangibles	301,709	285,732
Accumulated amortization, deferred financing costs	26,702	25,083
Deferred contract cost	26,081	26,955
Accumulated amortization, deferred contract cost	3,761	2,886
Other long-term assets	3,427	3,887
Accounts payable	435,589	401,088
Accrued liabilities	426,747	437,847
Long-term debt, discounts	6,746	6,929
Common Units
Common units issued (in units)	162,225	157,766
Common units outstanding (in units)	162,225	157,766
Class B Units
Common units issued (in units)	15,964	15,964
Common units outstanding (in units)	15,964	15,964
Total Variable Interest Entities
Cash and cash equivalents	0	4,114
Receivables, net	8,306	5,346
Inventories	6,065	2,553
Other current assets	7,782	5,527
Property, plant and equipment	1,906,365	1,655,789
Accumulated depreciation	52,668	33,583
Deferred contract cost	5,795	6,591
Accumulated amortization, deferred contract cost	796	0
Other long-term assets	313	658
Accounts payable	100,613	82,007
Accrued liabilities	$ 124,817	$ 112,029