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Employee Benefit Plans and Stock-based Compensation - Summary of Stock Options Outstanding (Detail) - Stock Options Outstanding [Member]
$ / shares in Units, shares in Thousands
9 Months Ended
Sep. 28, 2018
USD ($)
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Number of Shares, Beginning balance | shares 3,880
Weighted Average Exercise Price, Beginning balance | $ / shares $ 6.04
Grants in Period, Number of Shares | shares 0
Grants in Period, Weighted Average Exercise Price Per Share | $ / shares $ 0.00
Number of Shares, Options exercised | shares (88)
Weighted Average Exercise Price, Options exercised | $ / shares $ 2.93
Number of Shares, Forfeited or cancelled | shares (35)
Weighted Average Exercise Price, Forfeited or cancelled | $ / shares $ 4.76
Canceled or expired | shares (538)
Canceled or Expired, Weighted Average Exercise Price | $ / shares $ 8.75
Number of Shares, Ending balance | shares 3,219
Weighted Average Exercise Price, Ending balance | $ / shares $ 5.69
Weighted Average Remaining Contractual Term 2 years 6 months
Aggregate Intrinsic Value | $ $ 1,907,400
Number of Shares, Vested and expected to vest | shares 3,214
Weighted Average Exercise Price, Vested and expected to vest | $ / shares $ 5.69
Weighted Average Remaining Contractual Term (Years), Vested and expected to vest 2 years 6 months
Aggregate Intrinsic Value, Vested and expected to vest | $ $ 1,900,000
Number of Shares, Exercisable | shares 3,051
Weighted Average Exercise Price, Exercisable | $ / shares $ 5.74
Weighted Average Remaining Contractual Term (Years), Exercisable 2 years 6 months
Aggregate Intrinsic Value, Exercisable | $ $ 1,666,900