Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenues	$ 562,410	$ 633,996	$ 1,804,582	$ 1,891,399
Direct Financing Lease, Revenue	3,873	3,937	11,789	12,517
U.S. Liquids [Member]
Revenues	457,672	520,287	1,506,173	1,509,365
Direct Financing Lease, Revenue	3,873	3,937	11,789	12,517
U.S. Gas [Member]
Revenues	34,346	71,770	120,366	183,176
Canada [Member]
Revenues	70,392	41,939	178,043	156,715
Corporate, Non-Segment [Member]
Revenues	0	0	0	42,143
Intersegment Eliminations [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	(3,082)	(4,705)	(11,354)	(11,568)
Revenues	(3,082)	(4,705)	(11,354)	(11,568)
Intersegment Eliminations [Member] | U.S. Gas [Member]
Revenues	3,082	4,705	11,354	11,568
Product [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	399,679	487,693	1,336,914	1,421,751
Product [Member] | U.S. Liquids [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	380,442	434,591	1,257,556	1,259,709
Product [Member] | U.S. Gas [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	22,319	57,807	90,712	142,291
Product [Member] | Corporate, Non-Segment [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	0	31,319
Pipeline transportation [Member] | U.S. Liquids [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	21,062	21,386	63,419	63,327
Truck Transportation Revenue [Member] | U.S. Liquids [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	0	5,924	7,117	18,698
Storage Services [Member] | U.S. Liquids [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	41,143	41,915	124,000	118,848
Storage Services [Member] | Corporate, Non-Segment [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	0	(1)	0	7,753
Facility Service Fees [Member] | U.S. Liquids [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	11,152	12,534	42,292	36,266
Service Fees [Member] | U.S. Gas [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	15,109	18,668	40,925	52,453
Service Fees [Member] | Canada [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	51,661	27,609	125,276	108,553
Service Fees [Member] | Corporate, Non-Segment [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	0	1	0	3,071
Other revenue [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	18,749	14,330	52,904	48,162
Other revenue [Member] | U.S. Gas [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	0	0	83	0
Other revenue [Member] | Canada [Member]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 18,731	$ 14,330	$ 52,767	$ 48,162