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Goodwill and Other Intangible Assets - Schedule of Other Intangible Assets (Details) - USD ($) $ in Thousands | Jun. 27, 2015 | Dec. 27, 2014
--- | --- | ---
Other intangible assets |  |
Gross | $ 409,678 | $ 413,313
Accumulated Amortization | (240,740) | (237,876)
Net | 168,938 | 175,437
Indefinite-lived intangibles assets | 3,438 | 3,438
Total other intangibles assets, net | 172,376 | 178,875
Backlog |  |
Other intangible assets |  |
Gross | 8,903 | 8,728
Accumulated Amortization | (8,538) | (6,636)
Net | 365 | 2,092
Client relationships |  |
Other intangible assets |  |
Gross | 375,465 | 379,339
Accumulated Amortization | (219,111) | (217,938)
Net | 156,354 | 161,401
Trademarks and trade names |  |
Other intangible assets |  |
Gross | 6,599 | 6,603
Accumulated Amortization | (5,584) | (5,314)
Net | 1,015 | 1,289
Standard operating procedures |  |
Other intangible assets |  |
Gross | 2,303 | 2,309
Accumulated Amortization | (1,844) | (1,642)
Net | 459 | 667
Other identifiable intangible assets |  |
Other intangible assets |  |
Gross | 16,408 | 16,334
Accumulated Amortization | (5,663) | (6,346)
Net | $ 10,745 | $ 9,988

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