Segment Information - Reconciliation of Income Statement Items from Reportable Segments (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Reportable segments reconciliations:
Total revenue		$ 382,721	$ 233,599	$ 879,284	$ 323,767
Interest expense, net		(10,252)	(9,518)	(23,890)	(20,168)
Corporate activities		3,768	3,093	9,881	8,104
Other expense, net		(280)	(466)	(1,530)	(1,563)
Depreciation and amortization				(39,442)	(39,986)
Restructuring charges		(1,387)	(2,186)	(3,467)	(5,799)
Loss from continuing operations before income taxes		55,630	24,856	45,899	(68,699)
GES
Reportable segments reconciliations:
Total revenue		218,925	116,044	614,105	160,109
Pursuit
Reportable segments reconciliations:
Total revenue		163,796	117,555	265,179	163,658
Operating Segments
Reportable segments reconciliations:
Segment operating income (loss)		71,300	40,102	85,199	(33,117)
Operating Segments | GES
Reportable segments reconciliations:
Segment operating income (loss)		6,590	(9,499)	36,116	(56,300)
Operating Segments | Pursuit
Reportable segments reconciliations:
Total revenue		163,796	117,555	265,179	163,658
Segment operating income (loss)		64,710	49,601	49,083	23,183
Restructuring charges		0	(32)	0	(55)
Operating Segments | Spiro
Reportable segments reconciliations:
Total revenue		73,277	37,866	205,518	61,869
Segment operating income (loss)		3,720	(399)	18,328	(14,779)
Restructuring charges		71	422	1,297	598
Operating Segments | GES-Exhibitions
Reportable segments reconciliations:
Total revenue		147,872	81,138	414,303	101,347
Segment operating income (loss)		2,870	(9,100)	17,788	(41,521)
Restructuring charges		(1,316)	(1,707)	(2,140)	(5,101)
Impairment charges		0	0	(583)	0
Operating Segments | GES intersegment eliminations [Member]
Reportable segments reconciliations:
Total revenue		(2,224)	(2,960)	(5,716)	(3,107)
Corporate Eliminations
Reportable segments reconciliations:
Segment operating income (loss)	[1]	17	17	51	52
Corporate
Reportable segments reconciliations:
Segment operating income (loss)		(3,768)	(3,093)	(9,881)	(8,104)
Restructuring charges		$ 0	$ (25)	$ (30)	$ (45)

[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.