Segment Information - Reconciliation of Income Statement Items from Reportable Segments (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Reportable segments reconciliations:
Total revenue		$ 260,791	$ 177,360
Interest expense, net		(12,249)	(5,877)
Other expense, net		(531)	(638)
Restructuring charges		(453)	(654)
Loss from continuing operations before income taxes		(21,910)	(33,200)
GES
Reportable segments reconciliations:
Total revenue		228,128	153,576
Pursuit
Reportable segments reconciliations:
Total revenue		32,663	23,784
Operating Segments
Reportable segments reconciliations:
Segment operating income (loss)		(5,528)	(22,792)
Operating Segments | GES
Reportable segments reconciliations:
Segment operating income (loss)		13,584	(1,594)
Operating Segments | Pursuit
Reportable segments reconciliations:
Total revenue		32,663	23,784
Segment operating income (loss)		19,112	21,198
Restructuring charges		(7)	0
Operating Segments | Spiro
Reportable segments reconciliations:
Total revenue		60,362	42,816
Segment operating income (loss)		3,174	(239)
Restructuring charges		(137)	(418)
Operating Segments | GES-Exhibitions
Reportable segments reconciliations:
Total revenue		169,497	111,831
Segment operating income (loss)		10,410	(1,355)
Restructuring charges		(309)	(236)
Impairment charges		0	583
Operating Segments | GES intersegment eliminations [Member]
Reportable segments reconciliations:
Total revenue		(1,731)	(1,071)
Corporate Eliminations
Reportable segments reconciliations:
Segment operating income (loss)	[1]	16	17
Corporate
Reportable segments reconciliations:
Segment operating income (loss)		$ 3,165	$ 2,673

[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.