Overview and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Organization Consolidation And Presentation Of Financial Statements [Abstract]

Schedule of Corrections to Prior Period Adjustments

We determined that the error is not material to the previously issued financial statements. Note 2 – Revenue and Related Contract Costs and Contract Liabilities, Note 23 – Segment Information, and Note 24 – Selected Quarterly Financial Information reflect this correction.

	Year Ended December 31,
	2019						2018
(in thousands)	Services Revenue			Cost of Services			Services Revenue			Cost of Services
As previously reported	$	1,170,493		$	1,100,146		$	1,110,249		$	1,039,403
Gross to net correction for GES North America		(51,927	)		(51,927	)		(43,603	)		(43,603	)
Gross to net correction for GES EMEA		(17,032	)		(17,032	)		(15,257	)		(15,257	)
Total as corrected	$	1,101,534		$	1,031,187		$	1,051,389		$	980,543

Schedule of Cash and Cash Equivalents and Restricted Cash Balances

Cash, cash equivalents, and restricted cash balances presented in the Consolidated Statements of Cash Flows consisted of the following:

	December 31,
(in thousands)	2020		2019
Cash and cash equivalents	$	39,545	$	61,999
Restricted cash included in other current assets		2,426		5
Cash, cash equivalents, and restricted cash shown in the statement of cash flows	$	41,971	$	62,004