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Segment information (Details) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 25, 2016 USD ($) | Sep. 27, 2015 USD ($) | Sep. 25, 2016 USD ($) segment market | Sep. 27, 2015 USD ($)
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Number of reportable operating segments | segment |  |  | 6 |
Number of end markets | market |  |  | 2,000 |
Revenue | $ 455,648 | $ 443,714 | $ 1,354,094 | $ 1,325,189
Operating profit | 86,487 | 76,550 | 252,425 | 219,144
Operating Segments |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Operating profit | 98,078 | 95,865 | 299,888 | 275,838
Unallocated expenses |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Operating profit | (11,591) | (19,315) | (47,463) | (56,694)
Vascular North America |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenue | 85,118 | 82,675 | 254,817 | 244,606
Vascular North America | Operating Segments |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Operating profit | 21,781 | 18,086 | 63,431 | 50,891
Anesthesia North America |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenue | 48,670 | 47,628 | 143,821 | 138,656
Anesthesia North America | Operating Segments |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Operating profit | 13,954 | 15,178 | 41,181 | 36,572
Surgical North America |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenue | 41,827 | 39,591 | 123,904 | 118,170
Surgical North America | Operating Segments |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Operating profit | 14,050 | 12,814 | 39,654 | 39,456
EMEA |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenue | 121,398 | 120,854 | 375,198 | 379,268
EMEA | Operating Segments |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Operating profit | 16,576 | 19,656 | 61,563 | 65,334
Asia |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenue | 64,087 | 61,935 | 176,434 | 172,506
Asia | Operating Segments |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Operating profit | 18,072 | 15,715 | 52,831 | 42,812
OEM |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenue | 41,418 | 38,959 | 115,693 | 111,592
OEM | Operating Segments |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Operating profit | 10,201 | 8,865 | 24,605 | 25,274
All other |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Revenue | 53,130 | 52,072 | 164,227 | 160,391
All other | Operating Segments |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Operating profit | $ 3,444 | $ 5,551 | $ 16,623 | $ 15,499

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