Segment Disclosures (Schedule Of Business Segment Reporting Information) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Segment Reporting Information [Line Items]
Transportation and terminals revenue	$ 413,433	$ 410,387	$ 1,175,748	$ 1,149,100
Product sales revenue	133,356	172,731	403,607	455,827
Affiliate management fee revenue	4,993	3,557	11,140	10,478
Total revenue	551,782	586,675	1,590,495	1,615,405
Operating expenses	135,286	147,349	392,681	396,374
Cost of product sales	118,242	85,522	327,530	316,208
Earnings of non-controlled entities	(18,576)	(15,521)	(51,543)	(49,653)
Operating margin	316,830	369,325	921,827	952,476
Depreciation and amortization expense	47,081	42,043	134,137	124,180
G&A expenses	35,800	37,612	111,216	111,052
Operating profit	233,949	289,670	676,474	717,244
Operating Segments [Member] | Refined Products [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue	267,339	264,156	739,931	723,156
Product sales revenue	105,834	171,775	372,061	453,737
Affiliate management fee revenue	218	0	422	0
Total revenue	373,391	435,931	1,112,414	1,176,893
Operating expenses	95,776	108,972	280,261	288,265
Cost of product sales	93,761	85,341	300,009	315,301
Earnings of non-controlled entities	272	48	352	146
Operating margin	183,582	241,570	531,792	573,181
Depreciation and amortization expense	28,432	24,333	78,523	71,742
G&A expenses	22,993	22,238	68,852	68,730
Operating profit	132,157	194,999	384,417	432,709
Operating Segments [Member] | Crude Oil Pipeline and Terminals [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue	100,113	101,122	303,181	294,023
Product sales revenue	24,750	0	26,465	0
Affiliate management fee revenue	4,416	3,211	9,686	9,449
Total revenue	129,279	104,333	339,332	303,472
Operating expenses	24,628	24,572	66,370	65,032
Cost of product sales	24,108	0	26,469	0
Earnings of non-controlled entities	(18,180)	(14,906)	(49,870)	(47,735)
Operating margin	98,723	94,667	296,363	286,175
Depreciation and amortization expense	9,333	9,502	28,264	25,995
G&A expenses	8,493	9,818	27,419	26,935
Operating profit	80,897	75,347	240,680	233,245
Operating Segments [Member] | Marine Storage [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue	46,182	45,109	132,837	131,921
Product sales revenue	2,772	956	5,081	2,090
Affiliate management fee revenue	359	346	1,032	1,029
Total revenue	49,313	46,411	138,950	135,040
Operating expenses	16,374	14,700	49,897	45,916
Cost of product sales	373	181	1,052	907
Earnings of non-controlled entities	(668)	(663)	(2,025)	(2,064)
Operating margin	33,234	32,193	90,026	90,281
Depreciation and amortization expense	8,025	7,313	23,704	23,604
G&A expenses	4,314	5,556	14,945	15,387
Operating profit	20,895	19,324	51,377	51,290
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue	(201)	0	(201)	0
Product sales revenue	0	0	0	0
Affiliate management fee revenue	0	0	0	0
Total revenue	(201)	0	(201)	0
Operating expenses	(1,492)	(895)	(3,847)	(2,839)
Cost of product sales	0	0	0	0
Earnings of non-controlled entities	0	0	0	0
Operating margin	1,291	895	3,646	2,839
Depreciation and amortization expense	1,291	895	3,646	2,839
G&A expenses	0	0	0	0
Operating profit	$ 0	$ 0	$ 0	$ 0