Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Transportation and terminals revenue	$ 472,248	$ 433,239	$ 904,185	$ 825,910
Product sales revenue	166,797	182,004	408,389	427,624
Affiliate management fee revenue	5,046	4,197	10,296	7,980
Total revenue	644,091	619,440	1,322,870	1,261,514
Costs and expenses:
Operating	159,845	145,294	303,141	276,886
Cost of product sales	153,679	145,975	353,271	318,851
Depreciation and amortization	53,619	48,896	105,498	96,194
General and administrative	53,290	43,393	99,846	83,674
Total costs and expenses	420,433	383,558	861,756	775,605
Earnings of non-controlled entities	42,510	25,576	77,048	47,022
Operating profit	266,168	261,458	538,162	532,931
Interest expense	56,750	51,546	113,402	102,758
Interest capitalized	(5,608)	(3,183)	(10,255)	(7,380)
Interest income	(380)	(256)	(959)	(548)
Other (income) expense	(119)	2,043	8,605	3,213
Income before provision for income taxes	215,525	211,308	427,369	434,888
Provision for income taxes	1,116	908	2,050	1,752
Net income	$ 214,409	$ 210,400	$ 425,319	$ 433,136
Basic net income per limited partner unit (in dollars per share)	$ 0.94	$ 0.92	$ 1.86	$ 1.90
Diluted net income per limited partner unit (in dollars per share)	$ 0.94	$ 0.92	$ 1.86	$ 1.90
Weighted average number of limited partner units outstanding used for basic net income per unit calculation (in dollars per share)	228,387	228,192	228,354	228,151
Weighted average number of limited partner units outstanding used for diluted net income per unit calculation (in dollars per share)	228,425	228,245	228,393	228,202