Segment Information - Reconciliation of Income Statement Items from Reportable Segments (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Reportable segments reconciliations:
Total revenue		$ 285,594	$ 277,428
Segment operating income (loss)		(13,069)	(13,016)
Interest income		98	84
Interest expense		(2,915)	(2,069)
Other expense		(455)	(238)
Restructuring recoveries (charges)		(688)	(162)
Loss from continuing operations before income taxes		(25,529)	(15,401)
GES
Reportable segments reconciliations:
Total revenue		274,927	267,706
Pursuit
Reportable segments reconciliations:
Total revenue		10,667	9,722
Operating Segments
Reportable segments reconciliations:
Segment operating income (loss)		(11,252)	(10,815)
Operating Segments | GES
Reportable segments reconciliations:
Total revenue		274,927	267,706
Segment operating income (loss)		1,743	580
Legal settlement		(8,500)
Operating Segments | Pursuit
Reportable segments reconciliations:
Total revenue		10,667	9,722
Segment operating income (loss)		(12,995)	(11,395)
Restructuring recoveries (charges)			(140)
Intersegment Eliminations | GES
Reportable segments reconciliations:
Total revenue		(2,690)	(3,278)
Intersegment Eliminations | Pursuit
Reportable segments reconciliations:
Total revenue		(185)	(206)
Corporate Eliminations
Reportable segments reconciliations:
Segment operating income (loss)	[1]	16	16
Corporate
Reportable segments reconciliations:
Segment operating income (loss)		(1,833)	(2,217)
Restructuring recoveries (charges)		(43)	10
North America | Operating Segments | GES
Reportable segments reconciliations:
Total revenue	[2]	223,241	222,064
Segment operating income (loss)		608	(79)
Restructuring recoveries (charges)		17
EMEA | Operating Segments | GES
Reportable segments reconciliations:
Total revenue	[2]	54,376	48,920
Segment operating income (loss)		1,135	659
Restructuring recoveries (charges)		$ (662)	$ (32)

[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.

[2] During the first quarter of 2019, we realigned GES’ organizational structure. As a result, we changed GES’ reportable segments to reflect how our chief operating decision maker regularly reviews and makes decisions regarding the allocation of resources. Accordingly, GES’ new reportable segments are GES North America and GES EMEA.