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Pension and Postretirement Benefits - Accumulated benefit obligation in excess of plan assets (Details) (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Domestic Pension Plans | Funded Plans |  |
Accumulated benefit obligation in excess of plan assets |  |
Projected Benefit obligation | $ 16,012 us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = vvi_FundedPlanMember / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_DomesticPensionPlansOfForeignEntityDefinedBenefitMember | $ 13,435 us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = vvi_FundedPlanMember / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_DomesticPensionPlansOfForeignEntityDefinedBenefitMember
Accumulated benefit obligation | 16,012 us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = vvi_FundedPlanMember / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_DomesticPensionPlansOfForeignEntityDefinedBenefitMember | 13,435 us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = vvi_FundedPlanMember / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_DomesticPensionPlansOfForeignEntityDefinedBenefitMember
Fair value of Plan assets | 11,200 us-gaap_DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = vvi_FundedPlanMember / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_DomesticPensionPlansOfForeignEntityDefinedBenefitMember | 10,872 us-gaap_DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = vvi_FundedPlanMember / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_DomesticPensionPlansOfForeignEntityDefinedBenefitMember
Domestic Pension Plans | Unfunded Pension Plans |  |
Accumulated benefit obligation in excess of plan assets |  |
Projected Benefit obligation | 11,127 us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = vvi_UnfundedPensionPlansDefinedBenefitMember / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_DomesticPensionPlansOfForeignEntityDefinedBenefitMember | 10,536 us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = vvi_UnfundedPensionPlansDefinedBenefitMember / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_DomesticPensionPlansOfForeignEntityDefinedBenefitMember
Accumulated benefit obligation | 11,014 us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = vvi_UnfundedPensionPlansDefinedBenefitMember / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_DomesticPensionPlansOfForeignEntityDefinedBenefitMember | 10,227 us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = vvi_UnfundedPensionPlansDefinedBenefitMember / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_DomesticPensionPlansOfForeignEntityDefinedBenefitMember
Fair value of Plan assets | 0 us-gaap_DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = vvi_UnfundedPensionPlansDefinedBenefitMember / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_DomesticPensionPlansOfForeignEntityDefinedBenefitMember | 0 us-gaap_DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = vvi_UnfundedPensionPlansDefinedBenefitMember / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_DomesticPensionPlansOfForeignEntityDefinedBenefitMember
Foreign Plans | Funded Plans |  |
Accumulated benefit obligation in excess of plan assets |  |
Projected Benefit obligation | 12,016 us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = vvi_FundedPlanMember / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_ForeignPostretirementBenefitPlansDefinedBenefitMember | 11,460 us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = vvi_FundedPlanMember / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_ForeignPostretirementBenefitPlansDefinedBenefitMember
Accumulated benefit obligation | 11,268 us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = vvi_FundedPlanMember / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_ForeignPostretirementBenefitPlansDefinedBenefitMember | 10,823 us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = vvi_FundedPlanMember / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_ForeignPostretirementBenefitPlansDefinedBenefitMember
Fair value of Plan assets | 11,747 us-gaap_DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = vvi_FundedPlanMember / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_ForeignPostretirementBenefitPlansDefinedBenefitMember | 11,560 us-gaap_DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = vvi_FundedPlanMember / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_ForeignPostretirementBenefitPlansDefinedBenefitMember
Foreign Plans | Unfunded Pension Plans |  |
Accumulated benefit obligation in excess of plan assets |  |
Projected Benefit obligation | 2,756 us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = vvi_UnfundedPensionPlansDefinedBenefitMember / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_ForeignPostretirementBenefitPlansDefinedBenefitMember | 2,911 us-gaap_DefinedBenefitPlanPensionPlansWithAccumulatedBenefitObligationsInExcessOfPlanAssetsAggregateProjectedBenefitObligation / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = vvi_UnfundedPensionPlansDefinedBenefitMember / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_ForeignPostretirementBenefitPlansDefinedBenefitMember
Accumulated benefit obligation | 2,656 us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = vvi_UnfundedPensionPlansDefinedBenefitMember / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_ForeignPostretirementBenefitPlansDefinedBenefitMember | 2,911 us-gaap_DefinedBenefitPlanAccumulatedBenefitObligation / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = vvi_UnfundedPensionPlansDefinedBenefitMember / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_ForeignPostretirementBenefitPlansDefinedBenefitMember
Fair value of Plan assets | $ 0 us-gaap_DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = vvi_UnfundedPensionPlansDefinedBenefitMember / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_ForeignPostretirementBenefitPlansDefinedBenefitMember | $ 0 us-gaap_DefinedBenefitPlanPlansWithBenefitObligationsInExcessOfPlanAssetsAggregateFairValueOfPlanAssets / us-gaap_DefinedBenefitPlanByPlanAssetCategoriesAxis = vvi_UnfundedPensionPlansDefinedBenefitMember / us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis = us-gaap_ForeignPostretirementBenefitPlansDefinedBenefitMember

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- Definition For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Accumulated Benefit Obligation -URI http://asc.fasb.org/extlink&oid=6503844 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920 + Details
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- Definition If aggregate disclosures are presented, the aggregate projected benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=34716465&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e2417-114920 + Details
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- Definition If aggregate disclosures are presented, the aggregate fair value of plan assets for plans with benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e2417-114920 + Details
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