Partners' Capital (Tables)

12 Months Ended

Dec. 31, 2017

Partners' Capital Notes [Abstract]

Activity in the number of units

The following table summarizes activities of the common units issued under our ATM Program and general partner units issued to maintain the 2.0 percent general partner interest in the Partnership (in thousands, except unit amounts):

	Units Issued	Total Proceeds		Offering Costs		Net Proceeds
Year ended December 31, 2017:
Common – public	742,897	$	35,728	$	594	$	35,134
General partner	15,602	748		—		748
Year ended December 31, 2016:
Common – public	223,083	9,724		107		9,617
General partner	4,552	198		—		198

Unit Activity

Activity in the number of units was as follows:

	Common				General Partner
	Public	Valero	Subordinated			Total
Balance as of December 31, 2014	17,255,208	11,539,989	28,789,989		1,175,102	58,760,288
Unit-based compensation	4,443	—	—		—	4,443
Units issued in connection with acquisitions (see Note 2)	—	3,478,613	—		70,992	3,549,605
Unit issuance	4,250,000	—	—		—	4,250,000
General partner units issued to maintain 2% interest	—	—	—		86,735	86,735
Balance as of December 31, 2015	21,509,651	15,018,602	28,789,989		1,332,829	66,651,071
Unit-based compensation	5,958	—	—		—	5,958
Units issued in connection with acquisitions (see Note 2)	—	1,878,680	—		38,340	1,917,020
Conversion of subordinated units	—	28,789,989	(28,789,989	)	—	—
Units issued under ATM Program	223,083	—	—		—	223,083
General partner units issued to maintain 2% interest	—	—	—		4,552	4,552
Balance as of December 31, 2016	21,738,692	45,687,271	—		1,375,721	68,801,684
Unit-based compensation (see Note 11)	5,997	—	—		—	5,997
Units issued in connection with acquisitions (see Note 2)	—	1,081,315	—		22,068	1,103,383
Units issued under ATM Program	742,897	—	—		—	742,897
General partner units issued to maintain 2% interest	—	—	—		15,602	15,602
Balance as of December 31, 2017	22,487,586	46,768,586	—		1,413,391	70,669,563