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Restructuring Charges (Tables) | 12 Months Ended
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Dec. 31, 2023
Restructuring and Related Activities [Abstract] |
Changes to Restructuring Liability by Major Restructuring Activity | Changes to the restructuring liability by major restructuring activity are as follows:
|  | GES |  |  | Other Restructurings |  |  |  |
(in thousands) |  | Severance & Employee Benefits |  |  | Facilities |  |  | Severance & Employee Benefits |  |  | Total |
Balance at December 31, 2020 |  | $ | 2,440 |  |  | $ | 2,766 |  |  | $ | 24 |  |  | $ | 5,230 |
Restructuring charges |  |  | 1,829 |  |  |  | 4,107 |  |  |  | 130 |  |  |  | 6,066 |
Cash payments |  |  | (2,302 | ) |  |  | (3,506 | ) |  |  | (91 | ) |  |  | (5,899 | )
Non-cash items(1) |  |  | — |  |  |  | (1,906 | ) |  |  | — |  |  |  | (1,906 | )
Adjustment to liability |  |  | 9 |  |  |  | (28 | ) |  |  | (37 | ) |  |  | (56 | )
Balance at December 31, 2021 |  |  | 1,976 |  |  |  | 1,433 |  |  |  | 26 |  |  |  | 3,435 |
Restructuring charges |  |  | 624 |  |  |  | 2,351 |  |  |  | 84 |  |  |  | 3,059 |
Cash payments |  |  | (988 | ) |  |  | (863 | ) |  |  | (83 | ) |  |  | (1,934 | )
Non-cash items(1) |  |  | — |  |  |  | (1,167 | ) |  |  | — |  |  |  | (1,167 | )
Adjustment to liability |  |  | (3 | ) |  |  | 64 |  |  |  | (15 | ) |  |  | 46 |
Balance at December 31, 2022 |  |  | 1,609 |  |  |  | 1,818 |  |  |  | 12 |  |  |  | 3,439 |
Restructuring charges |  |  | 648 |  |  |  | 327 |  |  |  | 199 |  |  |  | 1,174 |
Cash payments |  |  | (623 | ) |  |  | (807 | ) |  |  | (213 | ) |  |  | (1,643 | )
Adjustment to liability |  |  | — |  |  |  | 40 |  |  |  | 2 |  |  |  | 42 |
Balance at December 31, 2023 |  | $ | 1,634 |  |  | $ | 1,378 |  |  | $ | — |  |  | $ | 3,012 |
(1) Represents non-cash adjustments related to a write-down of certain ROU assets and leasehold improvements as a result of vacating certain facilities prior to the lease term during the year ended December 31, 2022 and a write down of certain ROU assets as a result of vacating certain facilities prior to the lease term during the year ended December 31, 2021.

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- Definition Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 5.P.3) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479823/420-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482017/420-10-50-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 5.P.4) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479823/420-10-S99-2 + Details
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