Equity, Allocations of Net Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net income attributable to partners	$ 32,766	$ 19,173	$ 77,264	$ 37,851
Net income available to partners	25,314	17,546	63,744	35,038
General partner's ownership interest	2.00%	2.00%	2.00%	2.00%
Total general partner's interest in net income	(7,958)	(1,978)	(14,794)	(3,514)
General Partner
Net income attributable to partners			14,794
General partner's IDRs	(7,452)	(1,627)	(13,520)	(2,813)
General partner's allocated interest in net income	506	351	1,274	701
Total general partner's interest in net income	$ 7,958	$ 1,978	$ 14,794	$ 3,514