Segment Information - Reconciliation of Income Statement Items from Reportable Segments (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Reportable segments reconciliations:
Total revenue		$ 382,465	$ 255,946	$ 948,574	$ 837,377
Segment operating income (loss)		56,145	13,217	79,261	43,585
Interest income		44	65	138	571
Interest expense		(1,489)	(1,198)	(4,109)	(3,452)
Restructuring charges		(1,697)	(257)	(3,664)	(1,542)
Impairment charges		(120)		(120)
Income from continuing operations before income taxes		52,883	11,827	71,506	39,162
Travel & Recreation Group
Reportable segments reconciliations:
Impairment charges		(120)		(120)
Operating Segments
Reportable segments reconciliations:
Segment operating income (loss)		59,435	14,571	87,591	49,732
Operating Segments | Marketing & Events Group
Reportable segments reconciliations:
Total revenue		286,985	188,863	808,549	732,360
Segment operating income (loss)		15,187	(14,790)	42,858	18,977
Operating Segments | Travel & Recreation Group
Reportable segments reconciliations:
Total revenue		97,402	67,083	143,111	105,017
Segment operating income (loss)		44,248	29,361	44,733	30,755
Restructuring charges			(18)	(93)	(160)
Operating Segments | Marketing & Events U.S. Segment
Reportable segments reconciliations:
Restructuring charges		(1,498)	(25)	(1,791)	(496)
Operating Segments | Marketing & Events International Segment
Reportable segments reconciliations:
Restructuring charges		(203)	(213)	(1,374)	(484)
Intersegment Eliminations | Marketing & Events Group
Reportable segments reconciliations:
Total revenue		(6,425)	(4,321)	(15,439)	(13,475)
Corporate Eliminations
Reportable segments reconciliations:
Total revenue	[1]	(1,922)		(3,086)
Segment operating income (loss)	[1]	(518)		(940)
Corporate
Reportable segments reconciliations:
Segment operating income (loss)		(2,772)	(1,354)	(7,390)	(6,147)
Restructuring charges		4	(1)	(406)	(402)
U.S. Segment | Operating Segments | Marketing & Events Group
Reportable segments reconciliations:
Total revenue		232,484	148,314	636,299	550,006
Segment operating income (loss)		14,543	(9,039)	37,907	12,572
International Segment | Operating Segments | Marketing & Events Group
Reportable segments reconciliations:
Total revenue		60,926	44,870	187,689	195,829
Segment operating income (loss)		$ 644	$ (5,751)	$ 4,951	$ 6,405

[1] Represents the elimination of intercompany revenue and profit realized by the Marketing & Events Group for work completed on renovations for the Travel & Recreation Group’s Banff Gondola.