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Pension and Postretirement Benefits (Details Textual) (USD $)	9 Months Ended
	Sep. 30, 2012
Funded Pension Plans [Member]
Pension and Postretirement Benefits (Textual) [Abstract]
Amount expected to contribute in funded pension plans	$ 2,000,000
Amount contributed in pension plans	1,500,000
Unfunded Pension Plans [Member]
Pension and Postretirement Benefits (Textual) [Abstract]
Amount expected to contribute in unfunded pension plans	955,000
Amount contributed in pension plans	703,000
Postretirement Benefit Plans [Member]
Pension and Postretirement Benefits (Textual) [Abstract]
Amount expected to contribute in postretirement benefit plans	450,000
Amount contributed in postretirement benefit plans	$ 233,000

X

- Definition

The employer's best estimate, as soon as it can be reasonably determined, of contributions expected to be paid to the plan in the current remaining fiscal period. Estimated contributions may be presented in the aggregate combining (1) contributions required by funding regulations or laws, (2) discretionary contributions, and (3) noncash contributions.

+ References

No definition available.

+ Details

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

X

- Definition

The amount of cash or cash equivalents contributed during the reporting period by the entity to fund its pension plans and its non-pension postretirement benefit plans.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 25

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3536-108585

+ Details

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

X

- Definition

The amount of cash or cash equivalents contributed by the entity to fund its pension plans.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 28

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 25

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3536-108585

+ Details

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

X

- Definition

Defined benefit funded pension plan estimated future employer contributions in current fiscal year.

+ References

No definition available.

+ Details

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Namespace Prefix:	vvi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Defined benefit unfunded pension plan estimated future employer contributions in current fiscal year.

+ References

No definition available.

+ Details

Name:	vvi_DefinedBenefitUnfundedPensionPlanEstimatedFutureEmployerContributionsInCurrentFiscalYear
Namespace Prefix:	vvi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	vvi_PensionAndPostretirementBenefitsTextualAbstract
Namespace Prefix:	vvi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration