Segment Information - Reconciliation of Income Statement Items from Reportable Segments (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Reportable segments reconciliations:
Total revenue		$ 28,935	$ 294,658
Segment operating income (loss)		(40,213)	(10,189)
Interest income		33	79
Interest expense		(5,118)	(4,018)
Other expense		(360)	(419)
Restructuring recoveries (charges)		(2,826)	(851)
Impairment charges			88,380
Loss from continuing operations before income taxes		(48,484)	(103,778)
GES
Reportable segments reconciliations:
Total revenue		19,145	281,135
Pursuit
Reportable segments reconciliations:
Total revenue		9,790	13,523
Operating Segments
Reportable segments reconciliations:
Segment operating income (loss)		(38,225)	(9,416)
Operating Segments | GES
Reportable segments reconciliations:
Total revenue		19,145	281,135
Segment operating income (loss)		(19,904)	10,858
Restructuring recoveries (charges)		(2,783)	(656)
Impairment charges			(86,623)
Operating Segments | Pursuit
Reportable segments reconciliations:
Total revenue		9,790	13,523
Segment operating income (loss)		(18,321)	(20,274)
Restructuring recoveries (charges)		(23)	(1)
Impairment charges			(1,757)
Corporate Eliminations
Reportable segments reconciliations:
Segment operating income (loss)	[1]	17	16
Corporate
Reportable segments reconciliations:
Segment operating income (loss)		(2,005)	(789)
Restructuring recoveries (charges)		$ (20)	$ (194)

[1] Corporate eliminations represent the elimination of depreciation expense recorded by Pursuit associated with previously eliminated intercompany profit realized by GES for renovations to Pursuit’s Banff Gondola.