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Stock-Based Compensation - RSU Activity (Details) - RSUs
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 29, 2019
USD ($)
$ / shares
shares
Shares  
RSUs outstanding at beginning of period (in shares) | shares 4,857,334
Awarded (in shares) | shares 123,410
Vested and released (in shares) | shares (194,296)
Forfeited (in shares) | shares (100,630)
RSUs outstanding at end of period (in shares) | shares 4,685,818
Weighted Average Grant Date Fair Value Per Share  
RSUs outstanding at beginning of period (in dollars per share) | $ / shares $ 18.42
Awarded (in dollars per share) | $ / shares 22.94
Vested and released (in dollars per share) | $ / shares 7.83
Forfeited (in dollars per share) | $ / shares 18.13
RSUs outstanding at end of period (in dollars per share) | $ / shares $ 18.98
Weighted Average Remaining Contractual Term  
RSUs outstanding at end of period 2 years
Aggregate Intrinsic Value  
RSUs outstanding at end of period | $ $ 111,522