Segment Disclosures (Schedule Of Business Segment Reporting Information) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Segment Reporting Information [Line Items]
Revenues	$ 701,699	$ 644,091	$ 1,330,634	$ 1,322,870
Operating expenses	168,929	159,845	314,954	303,141
Cost of product sales	152,876	153,679	321,970	353,271
Other income	5,024	0	(1,917)	0
(Earnings) losses of non-controlled entities	(40,785)	(42,510)	(72,040)	(77,048)
Operating margin	415,655	373,077	767,667	743,506
Depreciation, amortization and impairment	62,530	53,619	124,401	105,498
G&A expense	52,383	53,290	98,378	99,846
Operating profit	300,742	266,168	544,888	538,162
Operating Segments [Member] | Refined Products Segment [Member]
Segment Reporting Information [Line Items]
Revenues	489,896	442,350	912,469	935,815
Operating expenses	115,811	113,342	205,489	207,391
Cost of product sales	146,516	137,543	306,670	327,876
Other income	(738)		(1,352)
(Earnings) losses of non-controlled entities	4,218	97	5,648	(2,221)
Operating margin	224,089	191,368	396,014	402,769
Depreciation, amortization and impairment	34,738	30,508	70,272	59,415
G&A expense	31,020	33,187	58,735	62,074
Operating profit	158,331	127,673	267,007	281,280
Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Revenues	164,510	155,084	321,317	291,797
Operating expenses	37,217	31,177	81,040	64,768
Cost of product sales	4,710	13,761	11,374	20,811
Other income	6,056		4,483
(Earnings) losses of non-controlled entities	(43,735)	(41,851)	(76,037)	(73,459)
Operating margin	160,262	151,997	300,457	279,677
Depreciation, amortization and impairment	15,743	12,741	31,002	25,503
G&A expense	14,097	13,455	26,712	25,361
Operating profit	130,422	125,801	242,743	228,813
Operating Segments [Member] | Marine Storage Segment [Member]
Segment Reporting Information [Line Items]
Revenues	48,634	47,572	99,127	97,088
Operating expenses	18,586	17,693	33,483	35,657
Cost of product sales	1,650	2,375	3,926	4,584
Other income	(294)		(5,048)
(Earnings) losses of non-controlled entities	(1,268)	(756)	(1,651)	(1,368)
Operating margin	29,960	28,260	68,417	58,215
Depreciation, amortization and impairment	10,705	8,918	20,348	17,735
G&A expense	7,266	6,648	12,931	12,411
Operating profit	11,989	12,694	35,138	28,069
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	(1,341)	(915)	(2,279)	(1,830)
Operating expenses	(2,685)	(2,367)	(5,058)	(4,675)
Cost of product sales	0	0	0	0
Other income	0		0
(Earnings) losses of non-controlled entities	0	0	0	0
Operating margin	1,344	1,452	2,779	2,845
Depreciation, amortization and impairment	1,344	1,452	2,779	2,845
G&A expense	0	0	0	0
Operating profit	0	0	0	0
Service [Member]
Segment Reporting Information [Line Items]
Revenues	506,405	472,248	967,197	904,185
Service [Member] | Operating Segments [Member] | Refined Products Segment [Member]
Segment Reporting Information [Line Items]
Revenues	306,215	291,064	573,220	551,458
Service [Member] | Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Revenues	155,569	137,953	303,177	264,211
Service [Member] | Operating Segments [Member] | Marine Storage Segment [Member]
Segment Reporting Information [Line Items]
Revenues	45,962	44,146	93,079	90,346
Service [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	(1,341)	(915)	(2,279)	(1,830)
Product [Member]
Segment Reporting Information [Line Items]
Revenues	189,989	166,797	352,984	408,389
Product [Member] | Operating Segments [Member] | Refined Products Segment [Member]
Segment Reporting Information [Line Items]
Revenues	183,211	150,934	338,367	383,708
Product [Member] | Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Revenues	5,295	13,282	11,008	19,721
Product [Member] | Operating Segments [Member] | Marine Storage Segment [Member]
Segment Reporting Information [Line Items]
Revenues	1,483	2,581	3,609	4,960
Product [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Product and Service, Other [Member]
Segment Reporting Information [Line Items]
Revenues	5,305	5,046	10,453	10,296
Product and Service, Other [Member] | Operating Segments [Member] | Refined Products Segment [Member]
Segment Reporting Information [Line Items]
Revenues	470	352	882	649
Product and Service, Other [Member] | Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Revenues	3,646	3,849	7,132	7,865
Product and Service, Other [Member] | Operating Segments [Member] | Marine Storage Segment [Member]
Segment Reporting Information [Line Items]
Revenues	1,189	845	2,439	1,782
Product and Service, Other [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	$ 0	$ 0	$ 0	$ 0