Consolidated Statements Of Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Consolidated Statements Of Income [Abstract]
Transportation and terminals revenues	$ 217,554	$ 205,408
Product sales revenues	275,730	237,296
Affiliate management fee revenue	199	193
Total revenues	493,483	442,897
Costs and expenses:
Operating	68,452	62,361
Product purchases	248,612	211,230
Depreciation and amortization	31,510	29,363
General and administrative	23,744	24,590
Total costs and expenses	372,318	327,544
Equity earnings	1,648	1,367
Operating profit	122,813	116,720
Interest expense	29,123	26,486
Interest income	(35)	(10)
Interest capitalized	(864)	(671)
Debt placement fee amortization expense	519	385
Income before provision for income taxes	94,070	90,530
Provision for income taxes	546	465
Net income	93,524	90,065
Allocation of net income (loss):
Non-controlling owners' interest		(63)
Limited partners' interest	93,524	90,128
Net income	$ 93,524	$ 90,065
Basic and diluted net income per limited partner unit	$ 0.83	$ 0.80
Weighted average number of limited partner units outstanding used for basic and diluted net income per unit calculation	113,091	112,762