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Operating Segments - Operating Segment Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jul. 02, 2017 | Jul. 03, 2016 | Jul. 02, 2017 | Jul. 03, 2016 | Dec. 31, 2016
Segment Reporting Information [Line Items] |  |  |  |  |
Depreciation expense | $ 11,500 | $ 12,000 | $ 22,900 | $ 23,700 |
Amortization expense | 27,113 | 26,263 | 50,782 | 51,795 |
Severance, restructuring, and acquisition integration costs | 9,560 | 5,869 | 16,160 | 14,277 |
Segment assets | 3,862,670 |  | 3,862,670 |  | $ 3,806,803
Broadcast Solutions |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Severance, restructuring, and acquisition integration costs | 970 | 1,319 | 1,378 | 5,697 |
Enterprise Solutions |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Severance, restructuring, and acquisition integration costs | 8,141 | 1,207 | 13,014 | 1,707 |
Industrial Solutions |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Severance, restructuring, and acquisition integration costs | 346 | 2,371 | 1,467 | 3,236 |
Reportable Segment |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Segment revenues | 610,633 | 603,381 | 1,162,014 | 1,147,181 |
Affiliate revenues | 1,946 | 1,719 | 5,052 | 4,052 |
Segment EBITDA | 110,227 | 108,335 | 203,337 | 198,401 |
Depreciation expense | 11,528 | 11,987 | 22,911 | 23,650 |
Amortization expense | 27,113 | 26,263 | 50,782 | 51,795 |
Severance, restructuring, and acquisition integration costs | 9,560 | 5,869 | 16,160 | 14,277 |
Purchase accounting effects of acquisitions | 1,167 | 0 | 1,167 | 195 |
Deferred gross profit adjustments | 0 | 1,750 | 0 | 4,053 |
Segment assets | 1,022,068 | 945,100 | 1,022,068 | 945,100 |
Reportable Segment | Broadcast Solutions |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Segment revenues | 188,071 | 193,521 | 356,667 | 364,793 |
Affiliate revenues | 94 | 173 | 195 | 597 |
Segment EBITDA | 29,610 | 29,505 | 55,010 | 52,772 |
Depreciation expense | 4,058 | 4,061 | 8,007 | 8,023 |
Amortization expense | 13,453 | 13,420 | 23,468 | 26,351 |
Severance, restructuring, and acquisition integration costs | 970 | 1,319 | 1,378 | 5,697 |
Purchase accounting effects of acquisitions | 1,167 |  | 1,167 | 195 |
Deferred gross profit adjustments |  | 494 |  | 1,108 |
Segment assets | 359,160 | 329,250 | 359,160 | 329,250 |
Reportable Segment | Enterprise Solutions |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Segment revenues | 160,733 | 160,401 | 306,415 | 296,293 |
Affiliate revenues | 1,545 | 1,328 | 4,103 | 3,027 |
Segment EBITDA | 26,801 | 29,575 | 50,901 | 53,311 |
Depreciation expense | 2,695 | 3,429 | 5,294 | 6,818 |
Amortization expense | 429 | 432 | 853 | 861 |
Severance, restructuring, and acquisition integration costs | 8,141 | 1,207 | 13,014 | 1,707 |
Purchase accounting effects of acquisitions | 0 |  | 0 | 0 |
Deferred gross profit adjustments |  | 0 |  | 0 |
Segment assets | 275,770 | 253,424 | 275,770 | 253,424 |
Reportable Segment | Industrial Solutions |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Segment revenues | 159,255 | 147,808 | 305,436 | 288,899 |
Affiliate revenues | 275 | 214 | 662 | 396 |
Segment EBITDA | 31,036 | 27,064 | 56,769 | 50,051 |
Depreciation expense | 3,168 | 2,709 | 6,374 | 5,427 |
Amortization expense | 640 | 601 | 1,282 | 1,192 |
Severance, restructuring, and acquisition integration costs | 346 | 2,371 | 1,467 | 3,236 |
Purchase accounting effects of acquisitions | 0 |  | 0 | 0 |
Deferred gross profit adjustments |  | 0 |  | 0 |
Segment assets | 282,068 | 255,250 | 282,068 | 255,250 |
Reportable Segment | Network Solutions |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Segment revenues | 102,574 | 101,651 | 193,496 | 197,196 |
Affiliate revenues | 32 | 4 | 92 | 32 |
Segment EBITDA | 22,780 | 22,191 | 40,657 | 42,267 |
Depreciation expense | 1,607 | 1,788 | 3,236 | 3,382 |
Amortization expense | 12,591 | 11,810 | 25,179 | 23,391 |
Severance, restructuring, and acquisition integration costs | 103 | 972 | 301 | 3,637 |
Purchase accounting effects of acquisitions | 0 |  | 0 | 0 |
Deferred gross profit adjustments |  | 1,256 |  | 2,945 |
Segment assets | $ 105,070 | $ 107,176 | $ 105,070 | $ 107,176 |

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