Segment Disclosures (Schedule Of Business Segment Reporting Information) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]
Transportation and terminals revenue	$ 317,637	$ 227,271
Product sales revenue	296,063	201,711
Affiliate management fee revenue	4,906	3,439
Total revenue	618,606	432,421
Operating expenses	73,497	65,181
Cost of product sales	198,040	160,398
Earnings of non-controlled entities	(466)	(2,051)
Operating margin	347,535	208,893
Depreciation and amortization expense	37,511	36,332
G&A expenses	34,935	30,056
Operating profit	275,089	142,505
Operating Segments [Member] | Refined Products [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue	210,236	165,359
Product sales revenue	293,710	199,415
Affiliate management fee revenue	0	0
Total revenue	503,946	364,774
Operating expenses	51,157	46,281
Cost of product sales	197,756	158,298
Earnings of non-controlled entities	0	0
Operating margin	255,033	160,195
Depreciation and amortization expense	23,172	21,353
G&A expenses	23,019	21,202
Operating profit	208,842	117,640
Operating Segments [Member] | Crude Oil Pipeline and Terminals [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue	67,903	23,228
Product sales revenue	0	0
Affiliate management fee revenue	4,595	3,159
Total revenue	72,498	26,387
Operating expenses	9,058	5,107
Cost of product sales	0	0
Earnings of non-controlled entities	180	(1,375)
Operating margin	63,260	22,655
Depreciation and amortization expense	6,463	7,469
G&A expenses	5,994	4,127
Operating profit	50,803	11,059
Operating Segments [Member] | Marine Storage [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue	39,498	38,684
Product sales revenue	2,353	2,296
Affiliate management fee revenue	311	280
Total revenue	42,162	41,260
Operating expenses	14,086	14,553
Cost of product sales	284	2,100
Earnings of non-controlled entities	(646)	(676)
Operating margin	28,438	25,283
Depreciation and amortization expense	7,072	6,750
G&A expenses	5,922	4,727
Operating profit	15,444	13,806
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue	0	0
Product sales revenue	0	0
Affiliate management fee revenue	0	0
Total revenue	0	0
Operating expenses	(804)	(760)
Cost of product sales	0	0
Earnings of non-controlled entities	0	0
Operating margin	804	760
Depreciation and amortization expense	804	760
G&A expenses	0	0
Operating profit	$ 0	$ 0