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Preferred Stock Purchase Rights (Details)
0 Months Ended
Jul. 01, 2014
Dec. 31, 2014
Equity [Abstract]    
Preferred Stock, Authorized   5,000,000us-gaap_PreferredStockSharesAuthorized
Junior participating preferred Stock, Authorized   2,000,000vvi_JuniorParticipatingPreferredStockSharesAuthorized
Preferred Stock, Shares Outstanding   0us-gaap_PreferredStockSharesOutstanding
Junior Preferred Stock, Shares Outstanding   0vvi_JuniorPreferredStockSharesOutstanding
Stockholders' Equity Note, Stock Split, Conversion Ratio 0.25us-gaap_StockholdersEquityNoteStockSplitConversionRatio1