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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 ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2015 | Sep. 27, 2015 | Jun. 28, 2015 | Mar. 29, 2015 | Dec. 31, 2014 | Sep. 28, 2014 | Jun. 29, 2014 | Mar. 30, 2014 | Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated Revenues | $ 597,244 | $ 579,266 | $ 585,755 | $ 546,957 | $ 608,910 | $ 610,774 | $ 600,891 | $ 487,690 | $ 2,309,222 | $ 2,308,265 | $ 2,069,193
Amortization of intangibles |  |  |  |  |  |  |  |  | (103,791) | (58,426) | (50,803)
Severance, restructuring, and acquisition integration costs | (13,600) | (14,100) | (4,900) | (14,600) | (22,000) | (9,200) | (38,200) | (1,400) | (47,170) | (70,827) | (14,888)
Depreciation expense |  |  |  |  |  |  |  |  | (46,600) | (43,700) | (43,600)
Purchase accounting effects related to acquisitions |  |  |  |  |  |  | (7,400) |  |  |  |
Income from equity method investment |  |  |  |  |  |  |  |  | 1,770 | 3,955 | 8,922
Consolidated operating income | $ 57,010 | $ 34,502 | $ 44,143 | $ 4,898 | $ 43,271 | $ 58,011 | $ 12,326 | $ 49,511 | 140,553 | 163,119 | 201,262
Interest expense, net |  |  |  |  |  |  |  |  | (100,613) | (81,573) | (72,601)
Loss on debt extinguishment |  |  |  |  |  |  |  |  |  |  | (1,612)
Income from continuing operations before taxes |  |  |  |  |  |  |  |  | 39,940 | 81,546 | 127,049
Reportable Segment [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated Revenues |  |  |  |  |  |  |  |  | 2,360,583 | 2,320,219 | 2,084,490
Deferred revenue adjustments |  |  |  |  |  |  |  |  | (51,361) | (11,954) | (15,297)
Total Segment EBITDA |  |  |  |  |  |  |  |  | 401,666 | 360,342 | 321,994
Amortization of intangibles |  |  |  |  |  |  |  |  | (103,791) | (58,426) | (50,803)
Deferred gross profit adjustments |  |  |  |  |  |  |  |  | (52,876) | (10,777) | (11,337)
Severance, restructuring, and acquisition integration costs |  |  |  |  |  |  |  |  | (47,170) | (70,827) | (14,888)
Depreciation expense |  |  |  |  |  |  |  |  | (46,551) | (43,736) | (43,648)
Purchase accounting effects related to acquisitions |  |  |  |  |  |  |  |  | (9,747) | (12,540) | (6,550)
Income from equity method investment |  |  |  |  |  |  |  |  | 1,770 | 3,955 | 8,922
Gain on sale of assets |  |  |  |  |  |  |  |  |  |  | 1,278
Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items] |  |  |  |  |  |  |  |  |  |  |
Consolidated operating income |  |  |  |  |  |  |  |  | $ (2,748) | $ (4,872) | $ (3,706)

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