CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement Of Income And Comprehensive Income [Abstract]
Net income		$ 23,380	$ 27,874	$ 13,545	$ 34,387
Other comprehensive income (loss):
Unrealized gains on investments, net of tax	[1]		33		95
Unrealized foreign currency translation adjustments, net of tax	[1]	(8,095)	7,360	(11,204)	9,705
Change in net actuarial gain, net of tax	[1]	220	171	849	282
Change in prior service cost, net of tax	[1]	4	(56)	(180)	(134)
Adoption of ASU 2016-01				(616)
Comprehensive income		15,509	35,382	2,394	44,335
Comprehensive loss attributable to non-redeemable noncontrolling interest		33	73	397	337
Comprehensive loss attributable to redeemable noncontrolling interest		77		161
Comprehensive income attributable to Viad		$ 15,619	$ 35,455	$ 2,952	$ 44,672

[1] The tax effect on other comprehensive income (loss) is not significant.