Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash paid for interest, net of amounts capitalized	$ 151,205	$ 134,233
Cash received for income taxes, net	5,705	197
Supplemental schedule of non-cash investing and financing activities:
Amounts payable for property, plant and equipment(1)	273,545	392,567
Interest capitalized on construction in progress	20,465	20,767
Issuance of common units for vesting of share-based payment awards	12,138	7,847
Accrued property, plant and equipment	164,200
Class B Units
Supplemental schedule of non-cash investing and financing activities:
Conversion of Class B units to common units	(150,506)	(150,506)
Common Units
Supplemental schedule of non-cash investing and financing activities:
Conversion of Class B units to common units	$ 150,506	$ 150,506