Segment Disclosures (Schedule Of Business Segment Reporting Information) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	May. 01, 2015	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Segment Reporting Information [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired				$ 54,678	$ 0
Transportation and terminals revenue		$ 400,944	$ 360,517	1,120,560	1,031,722
Product sales revenue		172,731	155,865	455,827	589,585
Affiliate management fee revenue		3,557	5,219	10,478	15,346
Total revenue		577,232	521,601	1,586,865	1,636,653
Operating expenses		137,906	132,387	367,834	330,758
Cost of product sales		85,522	91,591	316,208	398,734
Earnings of non-controlled entities		(15,521)	(1,645)	(49,653)	(4,066)
Operating margin		369,325	299,268	952,476	911,227
Depreciation and amortization expense		42,043	38,054	124,180	122,462
G&A expenses		37,612	35,377	111,052	109,621
Operating profit		289,670	225,837	717,244	679,144
Operating Segments [Member] | Refined Products [Member]
Segment Reporting Information [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired	$ 54,678
Transportation and terminals revenue		259,806	237,972	710,294	680,697
Product sales revenue		171,775	155,134	453,737	585,178
Affiliate management fee revenue		0	0	0	0
Total revenue		431,581	393,106	1,164,031	1,265,875
Operating expenses		104,622	101,206	275,403	249,665
Cost of product sales		85,341	91,407	315,301	397,980
Earnings of non-controlled entities		48	0	146	0
Operating margin		241,570	200,493	573,181	618,230
Depreciation and amortization expense		24,333	23,050	71,742	78,305
G&A expenses		22,238	22,600	68,730	70,993
Operating profit		194,999	154,843	432,709	468,932
Operating Segments [Member] | Crude Oil Pipeline and Terminals [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue		96,029	78,839	278,345	226,298
Product sales revenue		0	0	0	0
Affiliate management fee revenue		3,211	4,902	9,449	14,399
Total revenue		99,240	83,741	287,794	240,697
Operating expenses		19,479	14,375	49,354	35,300
Cost of product sales		0	0	0	0
Earnings of non-controlled entities		(14,906)	(959)	(47,735)	(1,667)
Operating margin		94,667	70,325	286,175	207,064
Depreciation and amortization expense		9,502	6,918	25,995	20,106
G&A expenses		9,818	7,635	26,935	21,326
Operating profit		75,347	55,772	233,245	165,632
Operating Segments [Member] | Marine Storage [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue		45,109	43,706	131,921	124,727
Product sales revenue		956	731	2,090	4,407
Affiliate management fee revenue		346	317	1,029	947
Total revenue		46,411	44,754	135,040	130,081
Operating expenses		14,700	17,691	45,916	48,321
Cost of product sales		181	184	907	754
Earnings of non-controlled entities		(663)	(686)	(2,064)	(2,399)
Operating margin		32,193	27,565	90,281	83,405
Depreciation and amortization expense		7,313	7,201	23,604	21,523
G&A expenses		5,556	5,142	15,387	17,302
Operating profit		19,324	15,222	51,290	44,580
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue		0	0	0	0
Product sales revenue		0	0	0	0
Affiliate management fee revenue		0	0	0	0
Total revenue		0	0	0	0
Operating expenses		(895)	(885)	(2,839)	(2,528)
Cost of product sales		0	0	0	0
Earnings of non-controlled entities		0	0	0	0
Operating margin		895	885	2,839	2,528
Depreciation and amortization expense		895	885	2,839	2,528
G&A expenses		0	0	0	0
Operating profit		$ 0	$ 0	$ 0	$ 0