Segment Disclosures (Schedule Of Business Segment Reporting Information) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Segment Reporting Information [Line Items]
Transportation and terminals revenue	$ 370,075	$ 353,812
Product sales revenue	146,562	173,127
Affiliate management fee revenue	3,179	3,363
Total revenue	519,816	530,302
Operating expenses	123,233	106,707
Cost of product sales	113,585	136,179
Earnings of non-controlled entities	(17,628)	(9,590)
Operating margin	300,626	297,006
Depreciation and amortization expense	43,754	41,697
G&A expenses	40,874	35,498
Operating profit	215,998	219,811
Operating Segments [Member] | Refined Products [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue	224,750	220,683
Product sales revenue	143,916	172,639
Affiliate management fee revenue	80	0
Total revenue	368,746	393,322
Operating expenses	85,985	74,212
Cost of product sales	111,856	135,634
Earnings of non-controlled entities	42	55
Operating margin	170,863	183,421
Depreciation and amortization expense	25,120	23,447
G&A expenses	25,361	22,599
Operating profit	120,382	137,375
Operating Segments [Member] | Crude Oil Pipeline and Terminals [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue	101,728	90,866
Product sales revenue	1,743	0
Affiliate management fee revenue	2,784	3,027
Total revenue	106,255	93,893
Operating expenses	21,192	18,167
Cost of product sales	1,345	0
Earnings of non-controlled entities	(16,979)	(8,924)
Operating margin	100,697	84,650
Depreciation and amortization expense	9,869	8,229
G&A expenses	9,780	8,086
Operating profit	81,048	68,335
Operating Segments [Member] | Marine Storage [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue	43,597	42,263
Product sales revenue	903	488
Affiliate management fee revenue	315	336
Total revenue	44,815	43,087
Operating expenses	17,248	15,335
Cost of product sales	384	545
Earnings of non-controlled entities	(691)	(721)
Operating margin	27,874	27,928
Depreciation and amortization expense	7,573	9,014
G&A expenses	5,733	4,813
Operating profit	14,568	14,101
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Transportation and terminals revenue	0	0
Product sales revenue	0	0
Affiliate management fee revenue	0	0
Total revenue	0	0
Operating expenses	(1,192)	(1,007)
Cost of product sales	0	0
Earnings of non-controlled entities	0	0
Operating margin	1,192	1,007
Depreciation and amortization expense	1,192	1,007
G&A expenses	0	0
Operating profit	$ 0	$ 0