Segment Disclosures (Segment Reporting Information By Segment) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Revenues	$ 2,727,912	$ 2,826,573	$ 2,507,661
Operating expenses	634,081	649,436	577,978
Cost of product sales	619,279	704,313	635,617
Other operating (income) expense	(2,975)	0	0
(Earnings) losses of non-controlled entities	(168,961)	(181,117)	(120,994)
Operating margin	1,646,488	1,653,941	1,415,060
Depreciation and amortization expense	246,134	265,077	196,630
G&A expenses	196,650	194,283	165,717
Operating profit	1,203,704	1,194,581	1,052,713
Additions to long-lived assets	980,575	562,296	572,744
Total assets	8,437,729	7,747,537	7,394,375
Goodwill	53,260	53,260	53,260
Investments in non-controlled entities	1,240,551	1,076,306	1,082,511
Operating Segments [Member]
Segment Reporting Information [Line Items]
Additions to long-lived assets	880,137	506,354	564,687
Total assets	8,306,653	7,491,246	7,188,235
Operating Segments [Member] | Refined Products Segment [Member]
Segment Reporting Information [Line Items]
Revenues	1,888,479	2,025,636	1,814,568
Operating expenses	411,849	424,851	400,439
Cost of product sales	582,271	650,071	586,751
Other operating (income) expense	(2,555)
(Earnings) losses of non-controlled entities	(4,140)	(16,039)	1,632
Operating margin	901,054	966,753	825,746
Depreciation and amortization expense	136,861	168,954	109,434
G&A expenses	117,291	118,491	103,225
Operating profit	646,902	679,308	613,087
Additions to long-lived assets	761,135	298,502	269,369
Total assets	4,302,945	3,715,653	3,499,492
Goodwill	38,369	38,369	38,369
Investments in non-controlled entities	24,457	37,574	29,578
Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Revenues	644,796	611,448	507,458
Operating expenses	164,236	166,213	120,920
Cost of product sales	28,051	44,128	41,325
Other operating (income) expense	7,213
(Earnings) losses of non-controlled entities	(160,891)	(162,233)	(120,173)
Operating margin	606,187	563,340	465,386
Depreciation and amortization expense	63,315	54,318	48,796
G&A expenses	53,310	51,523	41,490
Operating profit	489,562	457,499	375,100
Additions to long-lived assets	66,452	142,108	168,306
Total assets	2,791,035	2,710,068	2,817,186
Goodwill	12,082	12,082	12,082
Investments in non-controlled entities	818,167	783,486	961,032
Operating Segments [Member] | Marine Storage Segment [Member]
Segment Reporting Information [Line Items]
Revenues	200,054	193,180	189,038
Operating expenses	68,919	68,010	65,296
Cost of product sales	8,957	10,114	7,541
Other operating (income) expense	(7,633)
(Earnings) losses of non-controlled entities	(3,930)	(2,845)	(2,453)
Operating margin	133,741	117,901	118,654
Depreciation and amortization expense	40,452	35,858	33,126
G&A expenses	26,049	24,269	21,002
Operating profit	67,240	57,774	64,526
Additions to long-lived assets	52,550	65,744	127,012
Total assets	1,212,673	1,065,525	871,557
Goodwill	2,809	2,809	2,809
Investments in non-controlled entities	397,927	255,246	91,901
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Total assets	131,076	256,291	206,140
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	(5,417)	(3,691)	(3,403)
Operating expenses	(10,923)	(9,638)	(8,677)
Cost of product sales	0	0	0
Other operating (income) expense	0
(Earnings) losses of non-controlled entities	0	0	0
Operating margin	5,506	5,947	5,274
Depreciation and amortization expense	5,506	5,947	5,274
G&A expenses	0	0	0
Operating profit	0	0	0
Service [Member]
Segment Reporting Information [Line Items]
Revenues	1,970,630	1,878,988	1,731,775
Service [Member] | Operating Segments [Member] | Refined Products Segment [Member]
Segment Reporting Information [Line Items]
Revenues	1,186,966	1,151,980	1,096,040
Service [Member] | Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Revenues	602,045	549,849	458,455
Service [Member] | Operating Segments [Member] | Marine Storage Segment [Member]
Segment Reporting Information [Line Items]
Revenues	187,036	180,850	180,683
Service [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	(5,417)	(3,691)	(3,403)
Product [Member]
Segment Reporting Information [Line Items]
Revenues	736,092	927,220	758,206
Product [Member] | Operating Segments [Member] | Refined Products Segment [Member]
Segment Reporting Information [Line Items]
Revenues	699,766	872,144	717,140
Product [Member] | Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Revenues	28,280	46,767	35,053
Product [Member] | Operating Segments [Member] | Marine Storage Segment [Member]
Segment Reporting Information [Line Items]
Revenues	8,046	8,309	6,013
Product [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	0	0	0
Product and Service, Other [Member]
Segment Reporting Information [Line Items]
Revenues	21,190	20,365	17,680
Product and Service, Other [Member] | Operating Segments [Member] | Refined Products Segment [Member]
Segment Reporting Information [Line Items]
Revenues	1,747	1,512	1,388
Product and Service, Other [Member] | Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Revenues	14,471	14,832	13,950
Product and Service, Other [Member] | Operating Segments [Member] | Marine Storage Segment [Member]
Segment Reporting Information [Line Items]
Revenues	4,972	4,021	2,342
Product and Service, Other [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenues	$ 0	$ 0	$ 0