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Segment Information - Revenue and Other Financial Information by Reportable Segment (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 25, 2016 | Jun. 27, 2015 | Jun. 25, 2016 | Jun. 27, 2015
Segment Reporting Information [Line Items] |  |  |  |
Revenue | $ 434,055 | $ 339,573 | $ 788,923 | $ 659,987
Operating income | 58,061 | 55,735 | 109,533 | 98,740
Depreciation and amortization | 32,353 | 23,148 | 57,008 | 45,516
Capital expenditures | 11,791 | 13,908 | 20,041 | 24,556
Operating segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating income | 94,947 | 82,041 | 181,778 | 151,200
Depreciation and amortization | 30,243 | 21,369 | 53,426 | 41,839
Capital expenditures | 11,281 | 12,227 | 19,170 | 21,904
RMS | Operating segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 125,058 | 119,287 | 248,397 | 238,676
Operating income | 35,445 | 33,304 | 71,831 | 62,154
Depreciation and amortization | 5,118 | 5,308 | 10,368 | 11,311
Capital expenditures | 2,381 | 6,356 | 3,434 | 9,089
DSA | Operating segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 221,059 | 153,375 | 379,042 | 293,387
Operating income | 32,381 | 28,149 | 63,211 | 51,665
Depreciation and amortization | 18,600 | 12,412 | 30,557 | 23,551
Capital expenditures | 4,644 | 4,101 | 9,351 | 9,479
Manufacturing | Operating segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 87,938 | 66,911 | 161,484 | 127,924
Operating income | 27,121 | 20,588 | 46,736 | 37,381
Depreciation and amortization | 6,525 | 3,649 | 12,501 | 6,977
Capital expenditures | $ 4,256 | $ 1,770 | $ 6,385 | $ 3,336

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