Performance-Based Restricted Stock Units Activity (Detail) - Performance-Based Restricted Stock Units (PRUs) - $ / shares shares in Thousands |
6 Months Ended | |||||||
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Jul. 01, 2019 |
Jul. 02, 2018 |
[2] | ||||||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||||||
Outstanding shares as of December 31, 2018 | 255 | |||||||
Granted | 293 | |||||||
Change in units due to annual performance achievement | (51) | |||||||
Forfeited / cancelled | (6) | |||||||
Outstanding shares as of July 1, 2019 | 491 | |||||||
Weighted Average Grant-Date Fair Value | ||||||||
Outstanding shares as of December 31, 2018 | $ 18.75 | |||||||
Granted | 10.17 | [1] | $ 19.59 | |||||
Change in units due to annual performance achievement | 10.15 | |||||||
Forfeited / cancelled | 15.18 | |||||||
Outstanding shares as of July 1, 2019 | $ 14.57 | |||||||
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