Goodwill and Other Intangible Assets - Summary of Goodwill Balances by Component and Segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Line Items]
Balance, beginning	$ 99,847	$ 287,983
Business acquisitions	11,776
Goodwill impairment		(185,789)
Foreign currency translation adjustments	455	(415)
Other		(1,932)
Balance, ending	112,078	99,847
GES
Goodwill [Line Items]
Balance, beginning		186,105
Business acquisitions
Goodwill impairment		(184,031)
Foreign currency translation adjustments		(2,074)
Other
Balance, ending
Pursuit
Goodwill [Line Items]
Balance, beginning	99,847	101,878
Business acquisitions	11,776
Goodwill impairment		(1,758)
Foreign currency translation adjustments	455	1,659
Other		(1,932)
Balance, ending	$ 112,078	$ 99,847