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Goodwill and Intangible Assets - Schedule of Other Intangible Assets (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 30, 2017
--- | --- | ---
Other intangible assets |  |
Gross | $ 661,160 | $ 655,971
Accumulated Amortization | (290,864) | (286,209)
Net | 370,296 | 369,762
Backlog |  |
Other intangible assets |  |
Gross | 0 | 8,111
Accumulated Amortization | 0 | (8,111)
Net | 0 | 0
Technology |  |
Other intangible assets |  |
Gross | 83,428 | 81,309
Accumulated Amortization | (30,893) | (27,157)
Net | 52,535 | 54,152
Trademarks and trade names |  |
Other intangible assets |  |
Gross | 8,873 | 8,661
Accumulated Amortization | (4,609) | (4,562)
Net | 4,264 | 4,099
Other |  |
Other intangible assets |  |
Gross | 17,533 | 17,465
Accumulated Amortization | (8,456) | (7,845)
Net | 9,077 | 9,620
Other intangible assets |  |
Other intangible assets |  |
Gross | 109,834 | 115,546
Accumulated Amortization | (43,958) | (47,675)
Net | 65,876 | 67,871
Client relationships |  |
Other intangible assets |  |
Gross | 551,326 | 540,425
Accumulated Amortization | (246,906) | (238,534)
Net | $ 304,420 | $ 301,891

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