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Restructuring - Summary of Restructuring Activity for All Restructuring Initiatives (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Restructuring Cost And Reserve [Line Items] |  |
Balance, beginning of period | $ 6,065 | $ 2,547
Additions, charged to restructuring expenses | 8,203 | 12,919
Change in estimate | (2,400) |
Cash payments | (5,809) | (6,754)
Non-cash utilization | (687) | (2,512)
Reclassification to lease liability |  | (112)
Currency translation | 255 | (23)
Balance, end of period | 5,627 | 6,065
Employee Separation Costs |  |
Restructuring Cost And Reserve [Line Items] |  |
Balance, beginning of period | 5,994 | 2,079
Additions, charged to restructuring expenses | 6,932 | 8,056
Change in estimate | (2,382) |
Cash payments | (5,052) | (4,118)
Currency translation | 135 | (23)
Balance, end of period | 5,627 | 5,994
Accelerated Depreciation and Impairment |  |
Restructuring Cost And Reserve [Line Items] |  |
Additions, charged to restructuring expenses | 687 | 2,512
Non-cash utilization | (687) | (2,512)
Other Restructuring |  |
Restructuring Cost And Reserve [Line Items] |  |
Balance, beginning of period | 71 | 468
Additions, charged to restructuring expenses | 584 | 2,351
Change in estimate | (18) |
Cash payments | (757) | (2,636)
Reclassification to lease liability |  | (112)
Currency translation | $ 120 |
Balance, end of period |  | $ 71

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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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