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Pension and Postretirement Benefits - Components of Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Income (Loss) of Viad's Postretirement Benefit Plans (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Domestic Plans | Pension Plans      
Net periodic benefit cost:      
Service cost $ 64 $ 64 $ 98
Interest cost 780 803 1,032
Expected return on plan assets (193) (176) (256)
Recognized net actuarial loss 494 433 423
Net periodic benefit cost 1,145 1,124 1,297
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss):      
Net actuarial loss (gain) (76) 114 1
Reversal of amortization item:      
Net actuarial loss (494) (433) (423)
Total recognized in other comprehensive income (loss) (570) (319) (422)
Total recognized in net periodic benefit cost and other comprehensive income (loss) 575 805 875
Domestic Plans | Postretirement Benefit Plans      
Net periodic benefit cost:      
Service cost 80 92 99
Interest cost 449 413 573
Amortization of prior service credit (205) (431) (503)
Recognized net actuarial loss 405 164 295
Net periodic benefit cost 729 238 464
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss):      
Net actuarial loss (gain) 170 237 (790)
Prior service credit   816 73
Reversal of amortization item:      
Net actuarial loss (405) (164) (295)
Prior service credit 205 431 503
Total recognized in other comprehensive income (loss) (30) 1,320 (509)
Total recognized in net periodic benefit cost and other comprehensive income (loss) 699 1,558 (45)
Foreign Pension Plans      
Net periodic benefit cost:      
Service cost 552 530 488
Interest cost 381 492 488
Expected return on plan assets (505) (602) (558)
Recognized net actuarial loss 139 155 162
Settlement   777  
Net periodic benefit cost 567 1,352 580
Other changes in plan assets and benefit obligations recognized in other comprehensive income (loss):      
Net actuarial loss (gain) (238) (106) 158
Reversal of amortization item:      
Net actuarial loss (139) (155) (162)
Total recognized in other comprehensive income (loss) (377) (261) (4)
Total recognized in net periodic benefit cost and other comprehensive income (loss) $ 190 $ 1,091 $ 576