Goodwill and Other Intangible Assets (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended								12 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2011 SemStream [Member]	Dec. 31, 2013 Crude [Member]	Dec. 31, 2012 Crude [Member]	Dec. 31, 2013 SemGas [Member]	Dec. 31, 2012 SemGas [Member]	Dec. 31, 2013 Barcas Field Services, LLC [Member] Crude [Member]	Sep. 02, 2013 Barcas Field Services, LLC [Member] Crude [Member]	Dec. 31, 2013 Mid-America Midstream Gas Services, LLC [Member] SemGas [Member]	Aug. 01, 2013 Mid-America Midstream Gas Services, LLC [Member] SemGas [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 9,884	$ 9,453	$ 107,823		$ 28,322	$ 0	$ 23,839	$ 0		$ 28,322		$ 23,839
Impairments			(47,804)
Goodwill, Written off Related to Sale of Business Unit				(50,071)
Currency translation adjustments	(24)	431	(495)
Goodwill, Acquired During Period									28,322		23,839
Goodwill, Ending Balance	$ 62,021	$ 9,884	$ 9,453		$ 28,322	$ 0	$ 23,839	$ 0		$ 28,322		$ 23,839