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Revenue (Disaggregation of revenue) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | $ 2,130,240 | $ 2,346,809 | $ 2,635,231
Operating Segments [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 2,053,131 | 2,268,095 | 2,566,465
Operating Segments [Member] | Industrials Sector [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 373,061 | 453,576 | 493,063
Operating Segments [Member] | Aerospace And Defense Sector [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 423,571 | 431,923 | 406,402
Operating Segments [Member] | Medical Sector [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 498,470 | 448,202 | 393,967
Operating Segments [Member] | Semi-Cap Sector [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 368,974 | 277,765 | 354,978
Operating Segments [Member] | Computing Sector [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 171,337 | 361,213 | 580,845
Operating Segments [Member] | Telecommunications Sector [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 217,718 | 295,416 | 337,210
Elimination Of Intersegment Sales [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 77,109 | 78,714 | 68,766
Americas [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 1,209,032 | 1,428,795 | 1,647,402
Americas [Member] | Operating Segments [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 1,162,334 | 1,383,848 | 1,617,530
Americas [Member] | Operating Segments [Member] | Industrials Sector [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 110,063 | 165,163 | 184,500
Americas [Member] | Operating Segments [Member] | Aerospace And Defense Sector [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 401,599 | 400,326 | 374,852
Americas [Member] | Operating Segments [Member] | Medical Sector [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 255,246 | 263,688 | 235,287
Americas [Member] | Operating Segments [Member] | Semi-Cap Sector [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 158,380 | 102,908 | 155,687
Americas [Member] | Operating Segments [Member] | Computing Sector [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 140,109 | 308,077 | 504,391
Americas [Member] | Operating Segments [Member] | Telecommunications Sector [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 96,937 | 143,686 | 162,813
Americas [Member] | Elimination Of Intersegment Sales [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 46,698 | 44,947 | 29,872
Asia [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 746,661 | 741,630 | 801,312
Asia [Member] | Operating Segments [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 718,007 | 708,576 | 762,769
Asia [Member] | Operating Segments [Member] | Industrials Sector [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 196,209 | 214,575 | 241,765
Asia [Member] | Operating Segments [Member] | Medical Sector [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 211,567 | 167,296 | 144,528
Asia [Member] | Operating Segments [Member] | Semi-Cap Sector [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 159,016 | 123,764 | 135,299
Asia [Member] | Operating Segments [Member] | Computing Sector [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 31,228 | 53,051 | 69,657
Asia [Member] | Operating Segments [Member] | Telecommunications Sector [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 119,987 | 149,890 | 171,520
Asia [Member] | Elimination Of Intersegment Sales [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 28,654 | 33,054 | 38,543
Europe [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 174,547 | 176,384 | 186,517
Europe [Member] | Operating Segments [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 172,790 | 175,671 | 186,166
Europe [Member] | Operating Segments [Member] | Industrials Sector [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 66,789 | 73,838 | 66,798
Europe [Member] | Operating Segments [Member] | Aerospace And Defense Sector [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 21,972 | 31,597 | 31,550
Europe [Member] | Operating Segments [Member] | Medical Sector [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 31,657 | 17,218 | 14,152
Europe [Member] | Operating Segments [Member] | Semi-Cap Sector [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 51,578 | 51,093 | 63,992
Europe [Member] | Operating Segments [Member] | Computing Sector [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax |  | 85 | 6,797
Europe [Member] | Operating Segments [Member] | Telecommunications Sector [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | 794 | 1,840 | 2,877
Europe [Member] | Elimination Of Intersegment Sales [Member] |  |  |
Disaggregation Of Revenue [Line Items] |  |  |
Revenue from Contract with Customer, Excluding Assessed Tax | $ 1,757 | $ 713 | $ 351

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