Unrecognized cost of unvested share-based compensation awards.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

+ Details

Name:	us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Total change in each class of partners' capital accounts during the year due to unit-based compensation. All partners include general, limited and preferred partners.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 5

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187171-122770

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

+ Details

Name:	us-gaap_PartnersCapitalAccountUnitBasedCompensation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- References

No definition available.

+ Details

Name:	us-gaap_ShareBasedArrangementsToObtainGoodsAndServicesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Net number of non-option equity instruments granted to participants.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iv)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAvailableForGrant
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Percentage of vesting of share-based compensation awards.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

Name:	us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardAwardVestingRightsPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of non-employee directors on the entity's board of directors.

+ References

No definition available.

+ Details

Name:	vlp_EntityNumberofNonemployeeDirectors
Namespace Prefix:	vlp_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Definition

Date the equity-based award vests, in CCYY-MM-DD format.

+ References

No definition available.

+ Details

Name:	vlp_SharebasedCompensationArrangementbySharebasedPaymentAwardVestingDate
Namespace Prefix:	vlp_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PlanNameAxis=vlp_VLP2013IncentiveCompensationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_StockCompensationPlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=vlp_RestrictedStockIndependentDirectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=vlp_DistributionEquivalentRightsDERMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AwardTypeAxis=vlp_DistributionEquivalentRightsDERIndependentDirectorMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Unit-based Compensation (Details)			12 Months Ended
Unit-based Compensation (Details)	Jan. 08, 2015 independent_directors $ / shares shares	Jan. 20, 2014 independent_directors shares	Dec. 31, 2014 USD ($) $ / shares shares
Unit-based Compensation (Textual)
Number of non-employee directors \| independent_directors		3
Unit-based compensation \| $			$ 68,000
Subsequent Event [Member]
Unit-based Compensation (Textual)
Number of non-employee directors \| independent_directors	3
Weighted average period of recognition for unrecognized compensation costs on nonvested units (percentage)	33.33%
VLP 2013 Incentive Compensation Plan [Member]
Unit-based Compensation (Textual)
Unit-based compensation \| $			$ 68,000
VLP 2013 Incentive Compensation Plan [Member] \| Subsequent Event [Member]
Unit-based Compensation (Textual)
Weighted-average grant date fair value, granted \| $ / shares	$ 40.513
VLP 2013 Incentive Compensation Plan [Member] \| Stock Compensation Plan [Member]
Unit-based Compensation (Textual)
Number of common units available to be awarded under incentive compensation plans			2,994,792
VLP 2013 Incentive Compensation Plan [Member] \| Restricted Unit [Member]
Unit-based Compensation (Textual)
Restricted units granted in period		5,208
Vesting date, restricted units under 2013 ICP			Jan. 20, 2017
VLP 2013 Incentive Compensation Plan [Member] \| Restricted Unit [Member] \| Subsequent Event [Member]
Unit-based Compensation (Textual)
Restricted units granted in period	4,443
VLP 2013 Incentive Compensation Plan [Member] \| Restricted Stock - Independent Director [Member]
Unit-based Compensation (Textual)
Restricted units granted in period		1,736
Weighted-average grant date fair value, granted \| $ / shares			$ 34.575
Unrecognized unit-based compensation cost related to outstanding unvested units \| $			$ 156,000
Weighted average period of recognition for unrecognized compensation costs on nonvested units (years)			2 years
VLP 2013 Incentive Compensation Plan [Member] \| Restricted Stock - Independent Director [Member] \| Subsequent Event [Member]
Unit-based Compensation (Textual)
Restricted units granted in period	1,481
VLP 2013 Incentive Compensation Plan [Member] \| Distribution Equivalent Rights (DER) [Member]
Unit-based Compensation (Textual)
Distribution equivalent rights (DERs) granted in period		5,208
VLP 2013 Incentive Compensation Plan [Member] \| Distribution Equivalent Rights (DER) [Member] \| Subsequent Event [Member]
Unit-based Compensation (Textual)
Distribution equivalent rights (DERs) granted in period	4,443
VLP 2013 Incentive Compensation Plan [Member] \| Distribution Equivalent Rights (DER) - Independent Director [Member]
Unit-based Compensation (Textual)
Distribution equivalent rights (DERs) granted in period		1,736
VLP 2013 Incentive Compensation Plan [Member] \| Distribution Equivalent Rights (DER) - Independent Director [Member] \| Subsequent Event [Member]
Unit-based Compensation (Textual)
Distribution equivalent rights (DERs) granted in period	1,481