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Operating Segments and Geographic Information - Reconciliation of Total Reportable Segments' Revenues and EBITDA to Consolidated Revenues and Consolidated Income from Continuing Operations Before Taxes (Detail) - USD ($) |  |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Dec. 31, 2016 | Jan. 07, 2016 | Dec. 31, 2016 | Oct. 02, 2016 | Jul. 03, 2016 | Apr. 03, 2016 | Dec. 31, 2015 | Sep. 27, 2015 | Jun. 28, 2015 | Mar. 29, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | Jan. 02, 2015
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Patent settlement (4) |  |  | $ 10,300,000 |  |  |  |  |  |  |  |  |  |  |
Consolidated Revenues |  |  | 612,435,000 | $ 601,109,000 | $ 601,631,000 | $ 541,497,000 | $ 597,244,000 | $ 579,266,000 | $ 585,755,000 | $ 546,957,000 | $ 2,356,672,000 | $ 2,309,222,000 | $ 2,308,265,000 |
Amortization of intangibles |  |  |  |  |  |  |  |  |  |  | (98,385,000) | (103,791,000) | (58,426,000) |
Impairment of assets held for sale |  |  |  |  |  |  |  |  |  |  | (23,931,000) | 0 | 0 |
Severance, restructuring, and acquisition integration costs |  |  | (11,700,000) | (12,800,000) | (5,900,000) | (8,400,000) | (13,600,000) | (14,100,000) | (4,900,000) | (14,600,000) | (38,770,000) | (47,170,000) | (70,827,000) |
Depreciation expense |  |  |  |  |  |  |  |  |  |  | (47,200,000) | (46,600,000) | (43,700,000) |
Operating income |  |  | 58,668,000 | $ 61,980,000 | $ 62,241,000 | $ 40,964,000 | $ 57,010,000 | $ 34,502,000 | $ 44,143,000 | 4,898,000 | 223,853,000 | 140,553,000 | 163,119,000 |
Interest expense, net |  |  |  |  |  |  |  |  |  |  | (95,050,000) | (100,613,000) | (81,573,000) |
Loss on debt extinguishment |  |  |  |  |  |  |  |  |  |  | (2,342,000) | 0 | 0 |
Income from continuing operations before taxes |  |  |  |  |  |  |  |  |  |  | 126,461,000 | 39,940,000 | 81,546,000 |
Reportable Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Segment Revenues |  |  |  |  |  |  |  |  |  |  | 2,357,805,000 | 2,360,583,000 | 2,320,219,000 |
Deferred revenue adjustments |  |  |  |  |  |  |  |  |  |  | (6,687,000) | (51,361,000) | (11,954,000) |
Patent settlement (4) |  |  |  |  |  |  |  |  |  |  | 5,554,000 | 0 | 0 |
Consolidated Revenues |  |  |  |  |  |  |  |  |  |  | 2,356,672,000 | 2,309,222,000 | 2,308,265,000 |
Total Segment EBITDA |  |  |  |  |  |  |  |  |  |  | 433,189,000 | 401,666,000 | 360,342,000 |
Amortization of intangibles |  |  |  |  |  |  |  |  |  |  | (98,385,000) | (103,791,000) | (58,426,000) |
Impairment of assets held for sale |  |  |  |  |  |  |  |  |  |  | (23,931,000) | 0 | 0 |
Deferred gross profit adjustments |  |  |  |  |  |  |  |  |  |  | (6,687,000) | (52,876,000) | (10,777,000) |
Severance, restructuring, and acquisition integration costs |  |  |  |  |  |  |  |  |  |  | (38,770,000) | (47,170,000) | (70,827,000) |
Depreciation expense |  |  |  |  |  |  |  |  |  |  | (47,208,000) | (46,551,000) | (43,736,000) |
Purchase accounting effects related to acquisitions |  |  |  |  |  |  |  |  |  |  | 2,079,000 | (9,747,000) | (12,540,000) |
Income from equity method investment |  |  |  |  |  |  |  |  |  |  | 1,793,000 | 1,770,000 | 3,955,000 |
Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating income |  |  |  |  |  |  |  |  |  |  | (3,781,000) | (2,748,000) | (4,872,000) |
M2 FX Limited [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustment to reduce earn-out liability | $ 0 | $ 3,200,000 |  |  |  |  |  |  |  |  | 3,200,000 |  |  |
Acquired inventory | 200,000 |  | 200,000 |  |  |  |  |  |  |  | 200,000 |  |  |
Tripwire [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Amortization of intangibles |  |  |  |  |  |  |  |  |  |  |  | (43,200,000) |  |
Acquired inventory |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 603,000
Compensation expense |  |  |  |  |  |  |  |  |  | $ 9,200,000 |  | 9,200,000 |  |
Coast Wire And Plastic Tech [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cost of sales related to adjustment of acquired inventory |  |  |  |  |  |  |  |  |  |  |  | 300,000 |  |
Grass Valley and Prosoft [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cost of sales related to adjustment of acquired inventory |  |  |  |  |  |  |  |  |  |  |  |  | 8,300,000 |
Enterprise Solutions [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Severance, restructuring, and acquisition integration costs |  |  |  |  |  |  |  |  |  |  | (11,962,000) | (723,000) | (3,318,000) |
Acquired inventory | $ 800,000 |  | $ 800,000 |  |  |  |  |  |  |  | 800,000 |  |  |
Enterprise Solutions [Member] | Reportable Segment [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total Segment Revenues |  |  |  |  |  |  |  |  |  |  | 603,188,000 | 605,910,000 | 626,614,000 |
Total Segment EBITDA |  |  |  |  |  |  |  |  |  |  | 101,298,000 | 100,214,000 | 89,352,000 |
Amortization of intangibles |  |  |  |  |  |  |  |  |  |  | (1,718,000) | (1,720,000) | (1,827,000) |
Severance, restructuring, and acquisition integration costs |  |  |  |  |  |  |  |  |  |  | (11,962,000) | (723,000) | (3,435,000) |
Depreciation expense |  |  |  |  |  |  |  |  |  |  | (13,226,000) | (12,591,000) | (14,443,000) |
Purchase accounting effects related to acquisitions |  |  |  |  |  |  |  |  |  |  | $ (912,000) | $ (52,000) | $ (608,000) |

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