Equity, Allocations of Net Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Equity [Abstract]
Net income attributable to partners	$ 44,498	$ 18,678
General partner’s IDRs	(6,068)	(1,186)
Net income available to partners excluding IDRs	38,430	17,492
General partner’s ownership interest	2.00%	2.00%
General partner’s allocated interest in net income	768	350
General partner’s IDRs	6,068	1,186
Total general partner’s interest in net income	$ 6,836	$ 1,536
Incentive cash distribution allocation, percentage	100.00%