Goodwill and Other Intangible Assets - Goodwill by Reporting Unit and Segment (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 29, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill by reporting unit and segment
Goodwill	$ 254,022		$ 185,223	$ 194,197
GES U.S.
Goodwill by reporting unit and segment
Goodwill	148,277		112,300	110,618
GES International
Goodwill by reporting unit and segment
Goodwill	34,460		38,635	42,221
GES International | GES EMEA
Goodwill by reporting unit and segment
Goodwill	27,694		32,064
GES International | GES Canada
Goodwill by reporting unit and segment
Goodwill	6,766		6,571
GES
Goodwill by reporting unit and segment
Goodwill	182,737		150,935
Pursuit
Goodwill by reporting unit and segment
Goodwill	71,285		34,288	$ 41,358
Pursuit | Brewster Travel Canada
Goodwill by reporting unit and segment
Goodwill	32,587		29,836
Pursuit | Alaska Collection
Goodwill by reporting unit and segment
Goodwill	3,184		3,184
Pursuit | Glacier Park, Inc.
Goodwill by reporting unit and segment
Goodwill	1,268		$ 1,268
FlyOver Canada
Goodwill by reporting unit and segment
Goodwill		$ 34,089
FlyOver Canada | Pursuit
Goodwill by reporting unit and segment
Goodwill	$ 34,246