Derivative Financial Instruments (Details 4) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Impact of the Partnership's derivative instruments on Condensed Consolidated Statements of Operations
Unrealized (loss) gain			$ (7,024)	$ 46,320
Derivative instruments not designated as hedging instruments
Impact of the Partnership's derivative instruments on Condensed Consolidated Statements of Operations
Total (loss) gain	(20,762)	39,331	(16,663)	50,182
Derivative instruments not designated as hedging instruments | Revenue: Derivative (loss) gain
Impact of the Partnership's derivative instruments on Condensed Consolidated Statements of Operations
Realized (loss) gain	(1,774)	3,089	(9,381)	6,987
Unrealized (loss) gain	(4,979)	16,610	(1,339)	12,527
Total (loss) gain	(6,753)	19,699	(10,720)	19,514
Derivative instruments not designated as hedging instruments | Derivative (loss) gain related to purchased product costs
Impact of the Partnership's derivative instruments on Condensed Consolidated Statements of Operations
Realized (loss) gain	(144)	(1,045)	(258)	(3,125)
Unrealized (loss) gain	(11,820)	21,477	(3,908)	34,261
Total (loss) gain	(11,964)	20,432	(4,166)	31,136
Derivative instruments not designated as hedging instruments | Derivative loss related to facility expenses
Impact of the Partnership's derivative instruments on Condensed Consolidated Statements of Operations
Unrealized (loss) gain	$ (2,045)	$ (800)	$ (1,777)	$ (468)