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Stock Plans and Share-Based Compensation - Outstanding Restricted Stock Units and Award (Details) - Restricted Stock Units and Awards
shares in Thousands
12 Months Ended
Dec. 31, 2019
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]  
Unvested, Units Outstanding, beginning balance (in shares) | shares 684
Granted (in shares) | shares 88
Forfeited (in shares) | shares (30)
Vested (in shares) | shares (315)
Unvested, Units Outstanding, ending balance (in shares) | shares 427
Weighted-Average Fair Value at Grant Date  
Unvested, Weighted-Average Fair Value at Grant Date, beginning of period (in dollars per share) | $ / shares $ 39.30
Granted (in dollars per share) | $ / shares 69.19
Forfeited (in dollars per share) | $ / shares 53.28
Vested (in dollars per share) | $ / shares 24.21
Unvested, Weighted-Average Fair Value at Grant Date, end of period (in dollars per share) | $ / shares $ 57.29