Equity, Distributions Earned (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended						6 Months Ended
	Jun. 30, 2014		Mar. 31, 2014	Dec. 31, 2013	Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Distributions Earned by Limited or General Partners
Total limited partners' distributions	$ 33,840				$ 23,959		$ 65,969		$ 46,269
Total Cash Distributions	42,132		38,976	36,265	26,108		81,108		50,084
General Partner
Distributions Earned by Limited or General Partners
General partner's distributions	840				522		1,619		1,002
General partner's IDRs	7,452				1,627		13,520		2,813
Total general partner's distributions	8,292	[1]			2,149	[1]	15,139	[1]	3,815	[1]
Common
Distributions Earned by Limited or General Partners
Total limited partners' distributions	29,199				16,179		52,328		31,014
Subordinated
Distributions Earned by Limited or General Partners
Total limited partners' distributions	$ 4,641	[2]			$ 7,780	[2]	$ 13,641	[2]	$ 15,255	[2]

[1] General partner’s distributions (including IDRs) consist of an approximate 2% general partner interest and IDRs, which entitle the general partner to receive increasing percentages, up to 50%, of quarterly distributions in excess of $0.388125 per unit per quarter. See Note K of our Annual Report on Form 10-K for the year ended December 31, 2013 for further discussion related to IDRs.

[2] On May 16, 2014, the 15,254,890 subordinated units were converted into common units on a one-for-one basis and thereafter participate on terms equal with all other common units in distributions of available cash. Distributions and the Partnership’s net income were allocated to the subordinated units through May 15, 2014.