Income Per Share - Reconciliation of Basic and Diluted Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Numerator:
Net income attributable to Viad (diluted)	$ 44,657	$ 33,792	$ 79,381	$ 46,318
Less: Allocation to non-vested shares	(539)	(454)	(993)	(629)
Net income allocated to Viad common stockholders (basic)	$ 44,118	$ 33,338	$ 78,388	$ 45,689
Denominator:
Basic weighted-average outstanding common shares	20,166	20,017	20,130	19,972
Additional dilutive shares related to share-based compensation	270	190	252	178
Diluted weighted-average outstanding shares	20,436	20,207	20,382	20,150
Basic income attributable to Viad common stockholders	$ 2.19	$ 1.67	$ 3.89	$ 2.29
Diluted income attributable to Viad common stockholders	$ 2.19	$ 1.67	$ 3.89	$ 2.29