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Overview and Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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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 |

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- Definition Tabular disclosure of prior period adjustments to previously issued financial statements including (1) the effect of the correction on each financial statement line item and any per-share amounts affected for each prior period presented (2) the cumulative effect of the change on retained earnings or other appropriate components of equity or net assets in the statement of financial position, as of the beginning of the earliest period presented, and (3) the effect of the prior period adjustments (both gross and net of applicable income tax) on the net income of each prior period presented in the entity's annual report for the year in which the adjustments are made. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22663-107794 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22644-107794 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=109234566&loc=d3e22658-107794 + Details
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