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Restructuring and Related Activities - Restructuring Reserves (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Restructuring Reserve [Roll Forward] |  |  |
Beginning balance |  | $ 15,211 | $ 2,025
Accruals for voluntary and involuntary termination benefits |  |  | 15,645
Accruals for lease terminations |  |  | 7,117
Payments |  |  | (9,576)
Ending balance |  |  | 15,211
Employee Severance |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Beginning balance | $ 1,085 |  |
Accruals for voluntary and involuntary termination benefits | 15,645 |  |
Accruals for lease terminations | 0 |  |
Payments | (7,511) |  |
Ending balance | 9,219 | 1,085 |
Lease Termination Charges |  |  |
Restructuring Reserve [Roll Forward] |  |  |
Beginning balance | $ 5,992 | 940 |
Accruals for voluntary and involuntary termination benefits |  | 0 |
Accruals for lease terminations |  | 7,117 |
Payments |  | (2,065) |
Ending balance |  | $ 5,992 | $ 940

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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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- Definition Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan. + 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)) -URI http://asc.fasb.org/extlink&oid=115931487&loc=d3e140904-122747 + Details
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