Segment Disclosures (Segment Reporting Information By Segment) (Details) - USD ($) $ in Thousands	3 Months Ended															12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015		Jun. 30, 2015		Mar. 31, 2015		Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2015	Dec. 31, 2014		Dec. 31, 2013
Segment Reporting Information [Line Items]
Transportation and terminals revenue																$ 1,544,746	$ 1,459,267		$ 1,188,452
Product sales revenue																629,836	878,974		744,669
Affiliate management fee revenue																13,871	22,111		14,609
Total revenue	$ 573,048	$ 586,676	[1]	$ 498,427	[1]	$ 530,302	[1]	$ 678,193	[1]	$ 535,832	[1]	$ 512,435	[1]	$ 633,892	[1]	2,188,453	2,360,352		1,947,730
Operating expenses																525,902	500,901		396,194
Cost of product sales																447,273	594,585		578,029
Earnings of non-controlled entities																(66,483)	(19,394)		(6,275)
Operating margin	329,285	369,325		286,145		297,006		373,033		299,268		264,424		347,535		1,281,761	1,284,260		979,782
Depreciation and amortization expense																166,812	161,741		142,230
G&A expenses																151,329	148,288		132,496
Operating profit																963,620	974,231		705,056
Total assets	6,041,567							5,501,409								6,041,567	5,501,409		4,803,307
Goodwill	53,260							53,260								53,260	53,260		53,260
Investments in non-controlled entities	765,628							613,867								765,628	613,867		360,852
Revenue from Tender Deductions		$ 9,400		$ 10,900		$ 8,200		11,100		$ 14,200		$ 16,000		$ 15,300
Operating Segments [Member]
Segment Reporting Information [Line Items]
Additions to long-lived assets																671,048	622,012		593,059
Total assets	5,982,346							5,460,554								5,982,346	5,460,554		4,711,495
Operating Segments [Member] | Refined Products Segment [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue																974,505	946,612	[2]	826,202	[2]
Product sales revenue																623,102	872,537		738,271
Affiliate management fee revenue																0	0		0
Total revenue																1,597,607	1,819,149		1,564,473
Operating expenses																377,772	356,057	[2]	295,785	[2]
Cost of product sales																442,621	592,887		574,703
Earnings of non-controlled entities																193	0		0
Operating margin																777,021	870,205		693,985
Depreciation and amortization expense																96,244	101,642		86,926
G&A expenses																94,482	96,411		91,658
Operating profit																586,295	672,152		515,401
Additions to long-lived assets																310,907	163,753		361,134
Total assets	2,991,322							2,875,412								2,991,322	2,875,412		2,811,398
Goodwill	38,369							38,369								38,369	38,369		38,369
Investments in non-controlled entities	12,381							0								12,381	0		0
Revenue from Tender Deductions																	24,800		25,100
Operating Segments [Member] | Crude Oil Pipeline and Terminals Segment [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue																394,098	341,915	[2]	203,459	[2]
Product sales revenue																3,587	0		0
Affiliate management fee revenue																12,495	20,790		13,361
Total revenue																410,180	362,705		216,820
Operating expenses																89,455	83,184	[2]	44,181	[2]
Cost of product sales																3,278	0		0
Earnings of non-controlled entities																(63,918)	(16,309)		(3,781)
Operating margin																381,365	295,830		176,420
Depreciation and amortization expense																35,681	27,800		24,119
G&A expenses																36,000	29,557		19,896
Operating profit																309,684	238,473		132,405
Additions to long-lived assets																289,851	439,846		199,362
Total assets	2,313,110							1,937,242								2,313,110	1,937,242		1,252,036
Goodwill	12,082							12,082								12,082	12,082		12,082
Investments in non-controlled entities	739,470							599,757								739,470	599,757		345,904
Revenue from Tender Deductions																	31,800		25,000
Operating Segments [Member] | Marine Storage Segment [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue																176,143	170,740		158,791
Product sales revenue																3,147	6,437		6,398
Affiliate management fee revenue																1,376	1,321		1,248
Total revenue																180,666	178,498		166,437
Operating expenses																62,526	65,173		59,407
Cost of product sales																1,374	1,698		3,326
Earnings of non-controlled entities																(2,758)	(3,085)		(2,494)
Operating margin																119,524	114,712		106,198
Depreciation and amortization expense																31,036	28,786		28,006
G&A expenses																20,847	22,320		20,942
Operating profit																67,641	63,606		57,250
Additions to long-lived assets																70,290	18,413		32,563
Total assets	677,914							647,900								677,914	647,900		648,061
Goodwill	2,809							2,809								2,809	2,809		2,809
Investments in non-controlled entities	13,777							14,110								13,777	14,110		14,948
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Total assets	$ 59,221							$ 40,855								59,221	40,855		91,812
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue																0	0		0
Product sales revenue																0	0		0
Affiliate management fee revenue																0	0		0
Total revenue																0	0		0
Operating expenses																(3,851)	(3,513)		(3,179)
Cost of product sales																0	0		0
Earnings of non-controlled entities																0	0		0
Operating margin																3,851	3,513		3,179
Depreciation and amortization expense																3,851	3,513		3,179
G&A expenses																0	0		0
Operating profit																$ 0	$ 0		$ 0

[1] Includes adjustment of tender deductions as discussed in Note 2 – Summary of Significant Accounting Policies. The amounts adjusted for 2014 are as follows: first quarter $15.3 million; second quarter $16.0 million; third quarter $14.2 million; and fourth quarter $11.1 million. The amounts adjusted for 2015 are as follows: first quarter $8.2 million; second quarter $10.9 million; and third quarter $9.4 million.

[2] Includes adjustment of tender deductions as discussed in Note 2 – Summary of Significant Accounting Policies. The amounts adjusted for our refined products segment are $25.1 million and $24.8 million for 2013 and 2014, respectively. The amounts adjusted for our crude oil segment are $25.0 million and $31.8 million for 2013 and 2014, respectively.