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Segment and Geographic Information Financial Information by Reportable Business Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 26, 2015 | Sep. 26, 2015 | Jun. 27, 2015 | Mar. 28, 2015 | Dec. 27, 2014 | Sep. 27, 2014 | Jun. 28, 2014 | Mar. 29, 2014 | Dec. 26, 2015 | Dec. 27, 2014 | Dec. 28, 2013
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue | $ 353,850 | $ 349,465 | $ 339,573 | $ 320,414 | $ 329,548 | $ 327,567 | $ 341,179 | $ 299,368 | $ 1,363,302 | $ 1,297,662 | $ 1,165,528
Operating income | $ 52,269 | $ 55,440 | $ 55,735 | $ 43,005 | $ 40,767 | $ 46,172 | $ 51,025 | $ 39,706 | 206,449 | 177,670 | 151,401
Depreciation and amortization |  |  |  |  |  |  |  |  | 94,881 | 96,445 | 96,636
Capital expenditures |  |  |  |  |  |  |  |  | 63,252 | 56,925 | 39,154
RMS |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 473,230 | 507,327 | 511,350
Operating income |  |  |  |  |  |  |  |  | 121,447 | 121,376 | 116,737
Depreciation and amortization |  |  |  |  |  |  |  |  | 22,688 | 27,512 | 41,837
Capital expenditures |  |  |  |  |  |  |  |  | 17,398 | 18,749 | 16,717
DSA |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 612,173 | 538,218 | 432,378
Operating income |  |  |  |  |  |  |  |  | 121,981 | 69,749 | 47,413
Depreciation and amortization |  |  |  |  |  |  |  |  | 46,812 | 47,138 | 37,720
Capital expenditures |  |  |  |  |  |  |  |  | 30,333 | 19,759 | 12,561
Manufacturing |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  |  | 277,899 | 252,117 | 221,800
Operating income |  |  |  |  |  |  |  |  | 74,201 | 78,620 | 61,227
Depreciation and amortization |  |  |  |  |  |  |  |  | 17,967 | 14,092 | 17,079
Capital expenditures |  |  |  |  |  |  |  |  | $ 9,814 | $ 15,541 | $ 9,876

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