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Restructuring and Other Costs (Tables) | 12 Months Ended
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Dec. 31, 2020
Restructuring And Related Activities [Abstract] |
Schedule of Restructuring Reserve Liabilities by Type | As of December 31, 2020, the following liabilities remained on the Company's Consolidated Balance Sheets related to restructuring charges recorded in 2020 and 2017. The rollforwards of these costs to December 31, 2020 were as follows:
Restructuring and Other Costs |  | Deferred rent |  |  | Accrued compensation and related costs |  |  | Other accrued liabilities |  |  | Total |
|  | (In thousands) |
Balance at December 31, 2017 |  | $ | 2,846 |  |  | $ | 4,782 |  |  | $ | 1,785 |  |  | $ | 9,413 |
Additions |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Adjustments to accruals |  |  | (1,544 | ) |  |  | — |  |  |  | (643 | ) |  |  | (2,187 | )
Cash payments |  |  | — |  |  |  | (4,305 | ) |  |  | (656 | ) |  |  | (4,961 | )
Balance at December 31, 2018 |  |  | 1,302 |  |  |  | 477 |  |  |  | 486 |  |  |  | 2,265 |
Additions |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Adjustments to accruals |  |  | (1,302 | ) |  |  | — |  |  |  | 1 |  |  |  | (1,301 | )
Cash payments |  |  | — |  |  |  | (135 | ) |  |  | (15 | ) |  |  | (150 | )
Balance at December 31, 2019 |  |  | — |  |  |  | 342 |  |  |  | 472 |  |  |  | 814 |
Additions |  |  | — |  |  |  | 9,112 |  |  |  | 648 |  |  |  | 9,760 |
Adjustments to accruals |  |  | — |  |  |  | (453 | ) |  |  | (472 | ) |  |  | (925 | )
Cash payments |  |  | — |  |  |  | (5,632 | ) |  |  | (58 | ) |  |  | (5,690 | )
Balance at December 31, 2020 |  | $ | — |  |  | $ | 3,369 |  |  | $ | 590 |  |  | $ | 3,959 |

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- Definition Tabular disclosure of an entity's restructuring reserve that occurred during the period associated with the exit from or disposal of business activities or restructurings for each major type of cost. This element may also include a description of any reversal and other adjustment made during the period to the amount of an accrued liability for restructuring activities. This element may be used to encapsulate the roll forward presentations of an entity's restructuring reserve by type of cost and in total, and explanation of changes that occurred in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4(b)(2)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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