Segment Information - Reconciliation of Assets from Reportable Segments (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Reconciliation of assets from segment
Total Assets		$ 922,541	$ 919,899	$ 869,816
Total Depreciation and Amortization		56,842	55,114	42,743
Capital expenditures		83,345	56,621	49,815
GES | U.S.
Reconciliation of assets from segment
Total Assets		377,801	380,909	380,951
Total Depreciation and Amortization		29,711	29,088	21,473
Capital expenditures		18,453	17,337	14,291
GES | International
Reconciliation of assets from segment
Total Assets		140,481	135,917	109,705
Total Depreciation and Amortization		8,215	8,176	8,092
Capital expenditures		7,875	8,084	5,033
Pursuit
Reconciliation of assets from segment
Total Assets		357,630	350,256	301,941
Total Depreciation and Amortization		18,690	17,653	12,967
Capital expenditures		56,865	30,786	31,861
Corporate and other
Reconciliation of assets from segment
Total Assets		46,629	52,817	77,219
Total Depreciation and Amortization		226	197	211
Capital expenditures	[1]	$ 152	$ 414	$ (1,370)

[1] The 2016 amount includes an intercompany elimination for work completed by GES on renovations to Pursuit’s Banff Gondola.