Consolidated Statements Of Income (USD $) In Thousands, except Per Share data	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Consolidated Statements Of Income [Abstract]
Transportation and terminals revenues	$ 232,064	$ 206,727	$ 660,664	$ 573,069
Product sales revenues	203,253	199,284	600,492	585,318
Affiliate management fee revenue	193	190	578	569
Total revenues	435,510	406,201	1,261,734	1,158,956
Costs and expenses:
Operating	89,458	87,584	233,142	219,980
Product purchases	159,550	186,993	489,616	503,516
Depreciation and amortization	30,234	27,403	90,261	79,460
General and administrative	20,470	23,624	70,341	67,044
Total costs and expenses	299,712	325,604	883,360	870,000
Equity earnings	1,955	1,654	4,765	4,323
Operating profit	137,753	82,251	383,139	293,279
Interest expense	27,332	25,316	79,806	69,611
Interest income	(11)	(74)	(22)	(85)
Interest capitalized	(665)	(884)	(2,526)	(2,535)
Debt placement fee amortization expense	410	358	1,180	1,015
Other expense		750		750
Income before provision for income taxes	110,687	56,785	304,701	224,523
Provision for income taxes	447	148	1,397	900
Net income	110,240	56,637	303,304	223,623
Allocation of net income (loss):
Non-controlling owners' interest		(154)	(63)	(222)
Limited partners' interest	110,240	56,791	303,367	223,845
Net income	$ 110,240	$ 56,637	$ 303,304	$ 223,623
Basic and diluted net income per limited partner unit	$ 0.98	$ 0.51	$ 2.69	$ 2.06
Weighted average number of limited partner units outstanding used for basic and diluted net income per unit calculation	112,864	111,522	112,825	108,437