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Pension and Postretirement Benefits - Components of Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Income of Viad's Postretirement Benefit Plans (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Pension Plans    
Defined Benefit Plan Disclosure [Line Items]    
Service cost $ 9 $ 10
Interest cost 229 258
Expected return on plan assets (39) (93)
Recognized net actuarial loss 136 115
Net periodic benefit cost 335 290
US Postretirement Benefit Plans    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 30 36
Interest cost 126 151
Amortization of prior service credit (111) (126)
Recognized net actuarial loss 100 94
Net periodic benefit cost 145 155
Foreign Pension Plans    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 130 119
Interest cost 114 120
Expected return on plan assets (148) (137)
Recognized net actuarial loss 45 1
Net periodic benefit cost $ 141 $ 103