Segment Disclosures (Schedule Of Business Segment Reporting Information) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Transportation and terminals revenue	$ 433,239	$ 392,240	$ 825,910	$ 762,315
Product sales revenue	182,004	123,689	427,624	270,251
Affiliate management fee revenue	4,197	2,968	7,980	6,147
Total revenue	619,440	518,897	1,261,514	1,038,713
Operating expenses	145,294	134,183	276,886	257,096
Cost of product sales	145,975	95,703	318,851	209,288
(Earnings) losses of non-controlled entities	(25,576)	(15,339)	(47,022)	(32,967)
Operating margin	353,747	304,350	712,799	605,296
Depreciation and amortization expense	48,896	43,302	96,194	87,056
G&A expense	43,393	34,554	83,674	75,230
Operating profit	261,458	226,494	532,931	443,010
Operating Segments [Member] | Refined Products [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue	277,883	247,842	519,788	472,592
Product sales revenue	161,723	122,311	401,893	266,227
Affiliate management fee revenue	353	124	682	204
Total revenue	439,959	370,277	922,363	739,023
Operating expenses	100,713	98,513	194,246	184,287
Cost of product sales	125,220	94,392	292,901	206,248
(Earnings) losses of non-controlled entities	(422)	38	(533)	80
Operating margin	214,448	177,334	435,749	348,408
Depreciation and amortization expense	27,005	24,971	53,971	50,091
G&A expense	26,720	20,506	51,621	45,736
Operating profit	160,723	131,857	330,157	252,581
Operating Segments [Member] | Crude Oil Pipeline and Terminals [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue	108,455	101,340	213,508	203,068
Product sales revenue	19,403	(28)	22,506	1,715
Affiliate management fee revenue	3,474	2,486	6,608	5,270
Total revenue	131,332	103,798	242,622	210,053
Operating expenses	31,410	20,555	58,828	41,681
Cost of product sales	18,607	1,016	21,184	2,361
(Earnings) losses of non-controlled entities	(24,494)	(14,711)	(45,144)	(31,690)
Operating margin	105,809	96,938	207,754	197,701
Depreciation and amortization expense	12,507	9,062	23,363	18,931
G&A expense	11,071	9,149	21,110	18,888
Operating profit	82,231	78,727	163,281	159,882
Operating Segments [Member] | Marine Storage [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue	47,794	43,058	94,201	86,655
Product sales revenue	878	1,406	3,225	2,309
Affiliate management fee revenue	370	358	690	673
Total revenue	49,042	44,822	98,116	89,637
Operating expenses	15,375	16,278	28,030	33,483
Cost of product sales	2,148	295	4,766	679
(Earnings) losses of non-controlled entities	(660)	(666)	(1,345)	(1,357)
Operating margin	32,179	28,915	66,665	56,832
Depreciation and amortization expense	8,073	8,106	16,229	15,679
G&A expense	5,602	4,899	10,943	10,606
Operating profit	18,504	15,910	39,493	30,547
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue	(893)	0	(1,587)	0
Product sales revenue	0	0	0	0
Affiliate management fee revenue	0	0	0	0
Total revenue	(893)	0	(1,587)	0
Operating expenses	(2,204)	(1,163)	(4,218)	(2,355)
Cost of product sales	0	0	0	0
(Earnings) losses of non-controlled entities	0	0	0	0
Operating margin	1,311	1,163	2,631	2,355
Depreciation and amortization expense	1,311	1,163	2,631	2,355
G&A expense	0	0	0	0
Operating profit	$ 0	$ 0	$ 0	$ 0