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Schedule of Amortizable Intangible Assets (Detail) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 29, 2019 | Dec. 31, 2018
Finite-Lived Intangible Assets |  |  |
Gross Carrying Amount | $ 502,181 | [1] | $ 498,231
Accumulated Amortization | (397,225) | [1] | (367,531)
Foreign Currency Translation Adjustment | (8,383) |  | (5,218)
Net Carrying Amount | 96,573 |  | 125,482
Developed technology |  |  |
Finite-Lived Intangible Assets |  |  |
Gross Carrying Amount | 337,198 | [1] | 336,308
Accumulated Amortization | (272,317) | [1] | (252,080)
Foreign Currency Translation Adjustment | (6,461) |  | (4,079)
Net Carrying Amount | 58,420 |  | 80,149
Customer Relationships |  |  |
Finite-Lived Intangible Assets |  |  |
Gross Carrying Amount | 100,313 | [1] | 97,153
Accumulated Amortization | (89,540) | [1] | (83,448)
Foreign Currency Translation Adjustment | (562) |  | (340)
Net Carrying Amount | 10,211 |  | 13,365
Trademarks and tradenames |  |  |
Finite-Lived Intangible Assets |  |  |
Gross Carrying Amount | 64,670 | [1] | 64,420
Accumulated Amortization | (35,368) | [1] | (31,653)
Foreign Currency Translation Adjustment | (1,360) |  | (799)
Net Carrying Amount | $ 27,942 |  | 31,968
Non-compete Agreements |  |  |
Finite-Lived Intangible Assets |  |  |
Gross Carrying Amount |  |  | 320
Accumulated Amortization |  |  | (320)
Backlog |  |  |
Finite-Lived Intangible Assets |  |  |
Gross Carrying Amount |  |  | 30
Accumulated Amortization |  |  | $ (30)
[1] | $0.7 million of amortizable intangible assets became fully amortized and have been eliminated from the gross carrying amount and accumulated amortization.

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 928 -SubTopic 340 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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