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Cash Distributions and Net Income (Loss) per Common Unit (Details) (USD $)
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3 Months Ended | 9 Months Ended | 12 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 1 Months Ended | 12 Months Ended | ||||||||||||||||||||||||
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Sep. 30, 2013
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Sep. 30, 2012
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Sep. 30, 2013
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Sep. 30, 2012
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Dec. 31, 2012
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Sep. 30, 2013
Common Units
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Sep. 30, 2012
Common Units
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Sep. 30, 2013
Common Units
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Sep. 30, 2012
Common Units
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Sep. 30, 2013
Class B Unit [Member]
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Sep. 30, 2012
Class B Unit [Member]
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Sep. 30, 2013
Class B Unit [Member]
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Sep. 30, 2012
Class B Unit [Member]
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Sep. 30, 2013
Subordinated Units
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Sep. 30, 2012
Subordinated Units
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Sep. 30, 2013
Subordinated Units
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Sep. 30, 2012
Subordinated Units
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Sep. 30, 2013
General Partner [Member]
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Sep. 30, 2012
General Partner [Member]
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Sep. 30, 2013
General Partner [Member]
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Sep. 30, 2012
General Partner [Member]
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May 28, 2013
Class B Unit [Member]
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Sep. 30, 2012
Class B Unit [Member]
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May 31, 2012
Class B Unit [Member]
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Dec. 31, 2017
Common Units
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Dec. 31, 2016
Common Units
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Dec. 31, 2015
Common Units
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Dec. 31, 2014
Common Units
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Dec. 31, 2013
Common Units
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| Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items] | |||||||||||||||||||||||||||||||||||||
| Net loss | $ (98,109,000) | $ (51,370,000) | [1] | $ (196,851,000) | $ (106,818,000) | [1] | $ (48,741,000) | $ 0 | $ (123,855,000) | $ (6,105,000) | |||||||||||||||||||||||||||
| Partners' Capital Account, Units, Sold in Private Placement | 12,000,000 | 133,300,000 | |||||||||||||||||||||||||||||||||||
| Partners Capital Account, Units, Sold In Public Offering, Unit Price | $ 15.0 | $ 15.00 | |||||||||||||||||||||||||||||||||||
| Declared distributions | 24,754,000 | 17,125,000 | 74,261,000 | 44,376,000 | 24,259,000 | 16,783,000 | 72,776,000 | 43,488,000 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 495,000 | 342,000 | 1,485,000 | 888,000 | |||||||||||||||||
| Assumed allocation of undistributed net loss | (122,863,000) | (68,495,000) | (271,112,000) | (151,194,000) | (35,780,000) | (12,467,000) | (73,521,000) | (28,278,000) | 0 | 0 | 0 | 0 | (84,865,000) | (42,744,000) | (174,382,000) | (96,948,000) | (2,462,000) | (4,336,000) | (5,059,000) | (5,765,000) | |||||||||||||||||
| Assumed allocation of net income (loss) | (11,521,000) | 1,345,000 | (745,000) | 11,347,000 | 0 | 14,888,000 | 0 | 19,625,000 | (84,865,000) | (54,661,000) | (174,382,000) | (112,710,000) | (1,967,000) | (3,994,000) | (3,574,000) | (4,877,000) | |||||||||||||||||||||
| Net gain (loss) loss attributable to the Creole Trail Pipeline Business | 244,000 | (8,948,000) | [1] | (18,150,000) | (20,203,000) | [1] | (20,203,000) | ||||||||||||||||||||||||||||||
| Weighted average units outstanding (shares) | 57,079,000 | [1] | 53,277,000 | [1] | 57,079,000 | 31,997,000 | [1] | 53,277,000 | 31,449,000 | [1] | 0 | 54,710,000 | 0 | 19,181,000 | 135,384,000 | 135,384,000 | 135,384,000 | ||||||||||||||||||||
| Net income (loss) per common unit (US$ per share) | $ (0.20) | $ 0.04 | [1] | $ (0.01) | $ 0.36 | [1] | $ 0.00 | $ 0.27 | $ 0.00 | $ 1.02 | $ (0.63) | $ (0.40) | $ (1.29) | $ (0.83) | |||||||||||||||||||||||
| Amortization of Beneficial Conversion Feature of Class B Units | $ 0 | $ 0 | $ (2,971,000) | $ (3,863,000) | $ 14,888,000 | $ 19,625,000 | $ (11,917,000) | $ (15,762,000) | $ 0 | $ (538,538,000) | $ (32,023,000) | $ (241,000) | $ (2,000) | $ 0 | |||||||||||||||||||||||
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