Segment Disclosures (Schedule Of Business Segment Reporting Information) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting Information [Line Items]
Transportation and terminals revenue	$ 472,248	$ 433,239	$ 904,185	$ 825,910
Product sales revenue	166,797	182,004	408,389	427,624
Affiliate management fee revenue	5,046	4,197	10,296	7,980
Total revenue	644,091	619,440	1,322,870	1,261,514
Operating expenses	159,845	145,294	303,141	276,886
Cost of product sales	153,679	145,975	353,271	318,851
Earnings of non-controlled entities	(42,510)	(25,576)	(77,048)	(47,022)
Operating margin	373,077	353,747	743,506	712,799
Depreciation and amortization	53,619	48,896	105,498	96,194
G&A expense	53,290	43,393	99,846	83,674
Operating profit	266,168	261,458	538,162	532,931
Operating Segments [Member] | Refined Products Segment [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue	291,064	277,883	551,458	519,788
Product sales revenue	150,934	161,723	383,708	401,893
Affiliate management fee revenue	352	353	649	682
Total revenue	442,350	439,959	935,815	922,363
Operating expenses	113,342	100,713	207,391	194,246
Cost of product sales	137,543	125,220	327,876	292,901
Earnings of non-controlled entities	97	(422)	(2,221)	(533)
Operating margin	191,368	214,448	402,769	435,749
Depreciation and amortization	30,508	27,005	59,415	53,971
G&A expense	33,187	26,720	62,074	51,621
Operating profit	127,673	160,723	281,280	330,157
Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue	137,953	108,455	264,211	213,508
Product sales revenue	13,282	19,403	19,721	22,506
Affiliate management fee revenue	3,849	3,474	7,865	6,608
Total revenue	155,084	131,332	291,797	242,622
Operating expenses	31,177	31,410	64,768	58,828
Cost of product sales	13,761	18,607	20,811	21,184
Earnings of non-controlled entities	(41,851)	(24,494)	(73,459)	(45,144)
Operating margin	151,997	105,809	279,677	207,754
Depreciation and amortization	12,741	12,507	25,503	23,363
G&A expense	13,455	11,071	25,361	21,110
Operating profit	125,801	82,231	228,813	163,281
Operating Segments [Member] | Marine Storage Segment [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue	44,146	47,794	90,346	94,201
Product sales revenue	2,581	878	4,960	3,225
Affiliate management fee revenue	845	370	1,782	690
Total revenue	47,572	49,042	97,088	98,116
Operating expenses	17,693	15,375	35,657	28,030
Cost of product sales	2,375	2,148	4,584	4,766
Earnings of non-controlled entities	(756)	(660)	(1,368)	(1,345)
Operating margin	28,260	32,179	58,215	66,665
Depreciation and amortization	8,918	8,073	17,735	16,229
G&A expense	6,648	5,602	12,411	10,943
Operating profit	12,694	18,504	28,069	39,493
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue	(915)	(893)	(1,830)	(1,587)
Product sales revenue	0	0	0	0
Affiliate management fee revenue	0	0	0	0
Total revenue	(915)	(893)	(1,830)	(1,587)
Operating expenses	(2,367)	(2,204)	(4,675)	(4,218)
Cost of product sales	0	0	0	0
Earnings of non-controlled entities	0	0	0	0
Operating margin	1,452	1,311	2,845	2,631
Depreciation and amortization	1,452	1,311	2,845	2,631
G&A expense	0	0	0	0
Operating profit	$ 0	$ 0	$ 0	$ 0