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Deferred Revenue and Customer Advances (Detail) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
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Deferred Revenue Disclosure [Abstract] |  |  |  |
Maintenance, service and training | $ 66,458 | $ 78,089 |  |
Customer advances, undelivered elements and other | 35,731 | 59,147 |  |
Extended warranty | 34,897 | 56,180 | $ 64,168 | $ 51,929
Total deferred revenue and customer advances | $ 137,086 | $ 193,416 |  |

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- Definition Amount as of the balance sheet date of the aggregate extended product warranty liability. Does not include the ending balance for the standard product warranty liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482425/460-10-50-8 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (c)(5) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482425/460-10-50-8 + Details
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