Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Income Statement [Abstract]
Transportation and terminals revenue		$ 413,433	$ 410,387	$ 1,175,748	$ 1,149,100
Product sales revenue		133,356	172,731	403,607	455,827
Affiliate management fee revenue		4,993	3,557	11,140	10,478
Total revenue		551,782	586,675	1,590,495	1,615,405
Costs and expenses:
Operating		135,286	147,349	392,681	396,374
Cost of product sales		118,242	85,522	327,530	316,208
Depreciation and amortization		47,081	42,043	134,137	124,180
General and administrative		35,800	37,612	111,216	111,052
Total costs and expenses		336,409	312,526	965,564	947,814
Earnings of non-controlled entities		18,576	15,521	51,543	49,653
Operating profit		233,949	289,670	676,474	717,244
Interest expense		50,163	40,419	142,573	118,009
Interest income		(302)	(310)	(1,067)	(993)
Interest capitalized		(7,877)	(3,984)	(21,143)	(9,037)
Gain on exchange of interest in non-controlled entity		0	0	(28,144)	0
Other expense (income)		(3,324)	1,706	(7,519)	(4,554)
Income before provision for income taxes		195,289	251,839	591,774	613,819
Provision for income taxes		738	867	2,294	1,820
Net income		$ 194,551	$ 250,972	$ 589,480	$ 611,999
Basic net income per limited partner unit		$ 0.85	$ 1.10	$ 2.59	$ 2.69
Diluted net income per limited partner unit		$ 0.85	$ 1.10	$ 2.59	$ 2.69
Weighted average number of limited partner units outstanding used for basic net income per unit calculation(1)	[1]	227,960	227,580	227,913	227,540
Weighted average number of limited partner units outstanding used for diluted net income per unit calculation(1)	[1]	227,999	227,945	227,947	227,702

[1] See Note 10–Long-Term Incentive Plan for additional information regarding our weighted average unit calculations.