Overview and Basis of Presentation (Tables)

9 Months Ended

Sep. 30, 2020

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Schedule of Corrections to Prior Period Adjustments

	Three Months Ended September 30, 2019						Nine Months Ended September 30, 2019
(in thousands)	Services Revenue			Cost of Services			Services Revenue			Cost of Services
As previously reported	$	300,446		$	256,296		$	898,746		$	825,806
Gross to net correction for GES North America		(6,859	)		(6,859	)		(32,081	)		(32,081	)
Gross to net correction for GES EMEA		(1,886	)		(1,886	)		(8,594	)		(8,594	)
Total as corrected	$	291,701		$	247,551		$	858,071		$	785,131