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Goodwill and Other Intangibles (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 03, 2015 | Sep. 27, 2014 | Oct. 03, 2015 | Sep. 27, 2014 | Dec. 31, 2014
Goodwill [Line Items] |  |  |  |  |
Goodwill | $ 352,151 |  | $ 352,151 |  | $ 354,838
Goodwill foreign currency translation adjustments |  |  | (4,000) |  |
Intangible Assets [Line Items] |  |  |  |  |
Intangible assets, gross | 579,900 |  | 579,900 |  | 574,114
Intangible assets, accumulated amortization | 357,094 |  | $ 357,094 |  | $ 341,743
Weighted-average useful life of acquired intangible assets |  |  | 8 years |  | 8 years
Intangible assets, gross foreign currency translation adjustments |  |  | $ (31,000) |  |
Intangible assets, accumulated amortization foreign currency translation adjustments |  |  | (18,000) |  |
Amortization expense | 12,000 | $ 12,000 | 34,000 | $ 36,000 |
Future amortization expense, year 1 | 44,000 |  | 44,000 |  |
Future amortization expense, year 2 | 44,000 |  | 44,000 |  |
Future amortization expense, year 3 | 44,000 |  | 44,000 |  |
Future amortization expense, year 4 | 44,000 |  | 44,000 |  |
Future amortization expense, year 5 | 44,000 |  | 44,000 |  |
Capitalized software [Member] |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |
Intangible assets, gross | 335,517 |  | 335,517 |  | $ 334,280
Intangible assets, accumulated amortization | 202,468 |  | $ 202,468 |  | $ 196,477
Weighted-average useful life of acquired intangible assets |  |  | 7 years |  | 7 years
Purchased intangibles [Member] |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |
Intangible assets, gross | 163,144 |  | $ 163,144 |  | $ 163,855
Intangible assets, accumulated amortization | 117,632 |  | $ 117,632 |  | $ 112,279
Weighted-average useful life of acquired intangible assets |  |  | 11 years |  | 11 years
Trademarks and IPR&D[Member] |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |
Intangible assets, gross | 13,967 |  | $ 13,967 |  | $ 14,095
Licenses [Member] |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |
Intangible assets, gross | 5,499 |  | 5,499 |  | 5,371
Intangible assets, accumulated amortization | 3,995 |  | $ 3,995 |  | $ 3,634
Weighted-average useful life of acquired intangible assets |  |  | 6 years |  | 6 years
Patents and other intangibles [Member] |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |
Intangible assets, gross | 61,773 |  | $ 61,773 |  | $ 56,513
Intangible assets, accumulated amortization | 32,999 |  | $ 32,999 |  | $ 29,353
Weighted-average useful life of acquired intangible assets |  |  | 8 years |  | 8 years
Acquisitions in 2015 |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill | 1,118 |  | $ 1,118 |  |
Intangible Assets [Line Items] |  |  |  |  |
Intangible assets acquired | $ 3,700 |  | $ 3,700 |  |

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