Partners' Capital (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions				3 Months Ended	12 Months Ended
	Feb. 07, 2018	Aug. 21, 2015	Jul. 31, 2015	Mar. 31, 2016	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Mar. 30, 2017	Jan. 01, 2016	Dec. 31, 2015
Schedule of Partners' Capital [Line Items]
Limited partner interest, units outstanding (in shares)					82,985,941	82,665,057
Equity Distribution, Remaining Available Authorized Amount					$ 295.0
Common units issued in connection with the ATM (in shares)							1,268,750
Dollar value of units issued in connection with the ATM							$ 33.0
Payments of Stock Issuance Costs							$ 0.3
Common Unit Repurchase, Cash Consideration	$ 540.0
Repurchase Price per Common Unit	$ 31.2376
Percentage of membership interest acquired		100.00%
Eligible distribution per unit (in dollars per share)								$ 2.50
Class C Units [Member]
Schedule of Partners' Capital [Line Items]
Common unit, issuance value (in dollars per share)										$ 38.5856
Term of trading periods					5 days
Eligible distribution per unit (in dollars per share)					$ 0.8682
Distribution made to limited partner other certain allocation percentage					1.00%
Class C Units Subsidiary [Member]
Schedule of Partners' Capital [Line Items]
Limited partner interest, units outstanding (in shares)					16,410,780	16,410,780
Common Units [Member]
Schedule of Partners' Capital [Line Items]
Limited partner interest, units outstanding (in shares)					82,985,941	82,665,057	99,667,999
Common units issued in connection with the PIPE Transaction (in shares)				2,263,158
Common units repurchase						17,286,859
Partners' Capital Account, Units, Converted			79,308
Common Units [Member] | Class A Units [Member]
Schedule of Partners' Capital [Line Items]
Partners' Capital Account, Units, Converted			79,308
Subordinated Units [Member]
Schedule of Partners' Capital [Line Items]
Partners' Capital Account, Units, Converted			10,939,436
Subordinated Units [Member] | Class A Units [Member]
Schedule of Partners' Capital [Line Items]
Partners' Capital Account, Units, Converted			10,939,436
Common Units - Public [Member]
Schedule of Partners' Capital [Line Items]
Limited partner interest, units outstanding (in shares)					54,521,974
Parent Company [Member]
Schedule of Partners' Capital [Line Items]
Percentage of membership interest acquired					28.60%
Subsidiaries [Member] | Class C Units [Member]
Schedule of Partners' Capital [Line Items]
Limited partner interest, units outstanding (in shares)									11,168,667
Aloha Petroleum Ltd [Member] | Class C Units [Member]
Schedule of Partners' Capital [Line Items]
Limited partner interest, units outstanding (in shares)									5,242,113
Common Units Affiliated [Member]
Schedule of Partners' Capital [Line Items]
Common units outstanding (in shares)					28,463,967
Class C Units [Member]
Schedule of Partners' Capital [Line Items]
Units exchange (in shares)									16,410,780
Common Units [Member] | Parent Company [Member]
Schedule of Partners' Capital [Line Items]
Percentage of membership interest acquired					34.30%