Pension and Postretirement Benefits - Multi-Employer Pension Plans (Parenthetical) (Details)	12 Months Ended
Dec. 31, 2017 PensionFund
Compensation And Retirement Disclosure [Abstract]
Percentage of excess employer contributions	5.00%
Aggregate number of funds	35

Percentage of excess employer contribution made with base of plans forms.

No definition available.

Name:	vvi_PercentageOfExcessEmployerContributionMadeWithBaseOfPlansForms
Namespace Prefix:	vvi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration