Fair Values of Financial Instruments - Summary of Reconciliation of Acquisition Related Contingent Consideration (Detail) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||||
---|---|---|---|---|---|---|
Sep. 30, 2018 |
Oct. 01, 2017 |
Sep. 30, 2018 |
Oct. 01, 2017 |
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Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | ||||||
Payment of acquisition related contingent consideration | $ 18,312 | $ 11,650 | ||||
(Favorable)/unfavorable fair value adjustment | 1,584 | 23,140 | ||||
Level 3 [Member] | ||||||
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | ||||||
Beginning balance - Level 3 liability | $ 374,537 | $ 319,102 | 381,291 | 253,437 | ||
Measurement period adjustments | [1] | (1,279) | 813 | |||
Payment of acquisition related contingent consideration | (7,049) | (5,094) | (18,312) | (11,650) | ||
Reclassification to current payables | 150 | (1,540) | (2,080) | |||
(Favorable)/unfavorable fair value adjustment | (2,373) | (5,225) | 1,584 | 23,140 | ||
Ending balance - Level 3 liability | $ 363,836 | $ 308,933 | $ 363,836 | 308,933 | ||
Level 3 [Member] | System Transformation Transactions [Member] | ||||||
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items] | ||||||
Increase due to acquisitions | $ 46,086 | |||||
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