Stockholders' Equity and Equity Compensation Plans (Tables)

9 Months Ended

Sep. 30, 2020

Stockholders Equity Note [Abstract]

Summary of Unvested Restricted Common Stock Activity

A summary of our unvested restricted common stock activity during the quarter and nine months ended September 30, 2020 is as follows (shares in thousands):

	Quarter Ended					Nine Months Ended
	September 30, 2020					September 30, 2020
	Shares			Weighted- Average Grant Date Fair Value		Shares			Weighted- Average Grant Date Fair Value
Unvested awards, beginning		1,143		$	41.98		1,117		$	42.60
Awards granted		183			39.15		695			40.86
Awards forfeited/cancelled		(26	)		41.02		(54	)		41.82
Awards vested		(39	)		48.55		(497	)		43.72
Unvested awards, ending		1,261		$	41.39		1,261		$	41.39