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Goodwill and Intangible Assets - Schedule of Other Intangible Assets (Details) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 26, 2016 | Apr. 01, 2017 | Dec. 31, 2016
Other intangible assets |  |  |
Gross |  | $ 611,494 | $ 623,870
Accumulated Amortization |  | (241,681) | (229,422)
Net |  | 369,813 | 394,448
Impairment charge | $ 1,900 |  |
Backlog |  |  |
Other intangible assets |  |  |
Gross |  | 7,782 | 8,370
Accumulated Amortization |  | (7,351) | (6,390)
Net |  | 431 | 1,980
Backlog | CDMO Business | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |
Other intangible assets |  |  |
Decrease in intangible assets resulting from divestiture of business |  | 300 |
Technology |  |  |
Other intangible assets |  |  |
Gross |  | 72,241 | 71,425
Accumulated Amortization |  | (17,171) | (14,314)
Net |  | 55,070 | 57,111
Trademarks and trade names |  |  |
Other intangible assets |  |  |
Gross |  | 8,271 | 8,177
Accumulated Amortization |  | (4,204) | (4,124)
Net |  | 4,067 | 4,053
Other |  |  |
Other intangible assets |  |  |
Gross |  | 16,794 | 16,775
Accumulated Amortization |  | (6,026) | (5,628)
Net |  | 10,768 | 11,147
Other intangible assets |  |  |
Other intangible assets |  |  |
Gross |  | 105,088 | 104,747
Accumulated Amortization |  | (34,752) | (30,456)
Net |  | 70,336 | 74,291
Client relationships |  |  |
Other intangible assets |  |  |
Gross |  | 506,406 | 519,123
Accumulated Amortization |  | (206,929) | (198,966)
Net |  | 299,477 | $ 320,157
Client relationships | CDMO Business | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |
Other intangible assets |  |  |
Decrease in intangible assets resulting from divestiture of business |  | $ 16,800 |

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