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Operating Segments and Geographic Information - Operating Segment Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jul. 03, 2016 | Jun. 28, 2015 | Jul. 03, 2016 | Jun. 28, 2015 | Dec. 31, 2015
Segment Reporting Information [Line Items] |  |  |  |  |
Segment revenues | $ 601,631 | $ 585,755 | $ 1,143,128 | $ 1,132,712 |
Depreciation expense | 12,000 | 11,700 | 23,700 | 23,200 |
Amortization expense | 26,263 | 25,917 | 51,795 | 52,421 |
Severance, restructuring, and acquisition integration costs | 5,869 | 4,907 | 14,277 | 19,390 |
Segment assets | 3,254,890 |  | 3,254,890 |  | $ 3,290,602
Broadcast Solutions [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Severance, restructuring, and acquisition integration costs | 1,319 | 3,283 | 5,697 | 14,810 |
Enterprise Connectivity Solutions [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Severance, restructuring, and acquisition integration costs | 1,207 | 83 | 1,707 | 651 |
Industrial Connectivity Solutions [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Severance, restructuring, and acquisition integration costs | 2,371 | 1,163 | 3,236 | 2,936 |
Network Security Solutions [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Severance, restructuring, and acquisition integration costs | 29 | 378 | 29 | 1,045 |
Reportable Segment [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Segment revenues | 603,381 | 598,513 | 1,147,181 | 1,167,964 |
Affiliate revenues | 1,719 | 2,126 | 4,052 | 4,450 |
Segment EBITDA | 108,335 | 100,300 | 198,401 | 188,597 |
Depreciation expense | 11,987 | 11,692 | 23,650 | 23,233 |
Amortization expense | 26,263 | 25,917 | 51,795 | 52,421 |
Severance, restructuring, and acquisition integration costs | 5,869 | 4,907 | 14,277 | 19,390 |
Purchase accounting effects of acquisitions |  |  | 195 | 9,422 |
Deferred gross profit adjustments | 1,750 | 13,440 | 4,053 | 35,098 |
Segment assets | 945,100 | 1,005,496 | 945,100 | 1,005,496 |
Reportable Segment [Member] | Broadcast Solutions [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Segment revenues | 193,521 | 174,923 | 364,793 | 351,423 |
Affiliate revenues | 173 |  | 597 |  |
Segment EBITDA | 29,505 | 22,878 | 52,772 | 46,005 |
Depreciation expense | 4,061 | 4,140 | 8,023 | 8,113 |
Amortization expense | 13,420 | 12,595 | 26,351 | 25,021 |
Severance, restructuring, and acquisition integration costs | 1,319 | 3,283 | 5,697 | 14,810 |
Purchase accounting effects of acquisitions |  |  | 195 |  |
Deferred gross profit adjustments | 494 | (924) | 1,108 | 2,370 |
Segment assets | 329,250 | 352,848 | 329,250 | 352,848 |
Reportable Segment [Member] | Enterprise Connectivity Solutions [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Segment revenues | 160,401 | 161,827 | 296,293 | 303,608 |
Affiliate revenues | 1,328 | 1,708 | 3,027 | 3,680 |
Segment EBITDA | 29,575 | 29,792 | 53,311 | 49,801 |
Depreciation expense | 3,429 | 3,180 | 6,818 | 6,394 |
Amortization expense | 432 | 429 | 861 | 861 |
Severance, restructuring, and acquisition integration costs | 1,207 | 83 | 1,707 | 651 |
Segment assets | 253,424 | 279,360 | 253,424 | 279,360 |
Reportable Segment [Member] | Industrial Connectivity Solutions [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Segment revenues | 147,808 | 160,875 | 288,899 | 313,847 |
Affiliate revenues | 214 | 408 | 396 | 731 |
Segment EBITDA | 27,064 | 28,680 | 50,051 | 52,853 |
Depreciation expense | 2,709 | 2,869 | 5,427 | 5,720 |
Amortization expense | 601 | 807 | 1,192 | 1,630 |
Severance, restructuring, and acquisition integration costs | 2,371 | 1,163 | 3,236 | 2,936 |
Purchase accounting effects of acquisitions |  |  |  | 267 |
Segment assets | 255,250 | 267,448 | 255,250 | 267,448 |
Reportable Segment [Member] | Industrial IT Solutions [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Segment revenues | 62,510 | 61,270 | 116,392 | 122,343 |
Affiliate revenues | 4 | 10 | 32 | 31 |
Segment EBITDA | 12,676 | 10,178 | 21,285 | 21,265 |
Depreciation expense | 660 | 584 | 1,184 | 1,143 |
Amortization expense | 1,506 | 1,479 | 3,016 | 2,889 |
Severance, restructuring, and acquisition integration costs | 943 |  | 3,608 | (52) |
Segment assets | 65,603 | 63,599 | 65,603 | 63,599 |
Reportable Segment [Member] | Network Security Solutions [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Segment revenues | 39,141 | 39,618 | 80,804 | 76,743 |
Affiliate revenues |  |  |  | 8 |
Segment EBITDA | 9,515 | 8,772 | 20,982 | 18,673 |
Depreciation expense | 1,128 | 919 | 2,198 | 1,863 |
Amortization expense | 10,304 | 10,607 | 20,375 | 22,020 |
Severance, restructuring, and acquisition integration costs | 29 | 378 | 29 | 1,045 |
Purchase accounting effects of acquisitions |  |  |  | 9,155 |
Deferred gross profit adjustments | 1,256 | 14,364 | 2,945 | 32,728 |
Segment assets | $ 41,573 | $ 42,241 | $ 41,573 | $ 42,241 |

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