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Restructuring and Related Charges - Restructuring liability (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Restructuring Liability Rollforward |  |  |
Beginning balance | $ 8,283 | $ 20,887 | $ 8,781
Restructuring and other charges | 11,967 | 3,920 | 16,319
Payments | (17,128) | (9,984) | (4,656)
Adjustments | 0 | (6,540) | 443
Ending balance | 3,122 | 8,283 | 20,887
Accounts payable and accrued expenses |  |  |
Restructuring Liability Rollforward |  |  |
Restructuring liabilities | 3,100 | 6,400 |
Lease and Related Costs, Net |  |  |
Restructuring Liability Rollforward |  |  |
Beginning balance | 0 | 6,540 | 8,781
Restructuring and other charges | 0 | 0 | 0
Payments | 0 | 0 | (2,684)
Adjustments | 0 | (6,540) | 443
Ending balance | 0 | 0 | 6,540
Severance and Other Employee Separation Costs | CEC Integration Plan |  |  |
Restructuring Liability Rollforward |  |  |
Beginning balance | 8,283 | 14,347 | 0
Restructuring and other charges | 0 | 3,920 | 16,319
Payments | (6,448) | (9,984) | (1,972)
Adjustments | 0 | 0 | 0
Ending balance | 1,835 | 8,283 | 14,347
Severance and Other Employee Separation Costs | 2020 Restructuring Plan |  |  |
Restructuring Liability Rollforward |  |  |
Beginning balance | 0 | 0 | 0
Restructuring and other charges | 11,967 | 0 | 0
Payments | (10,680) | 0 | 0
Adjustments | 0 | 0 | 0
Ending balance | $ 1,287 | $ 0 | $ 0

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- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 17 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3367-108585 + Details
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