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Stockholders' Equity and Equity Compensation Plans (Tables)
 3 Months Ended
Mar. 31, 2020
Stockholders Equity Note [Abstract]  
Summary of Unvested Restricted Common Stock Activity A summary of our unvested restricted common stock activity during the first quarter of 2020 is as follows (shares in thousands):

 

Quarter Ended

 

 

 

 

March 31, 2020

 

 

 

 

Shares

 

 

Weighted-

Average

Grant

Date Fair Value

 

 

 

Unvested awards, beginning

 

1,117

 

 

$

42.60

 

 

 

Awards granted

 

498

 

 

 

47.56

 

 

 

Awards forfeited/cancelled

 

(14

)

 

 

43.00

 

 

 

Awards vested

 

(448

)

 

 

43.23

 

 

 

Unvested awards, ending

 

1,153

 

 

$

44.55