Stockholders' Equity - (Tables)

9 Months Ended

Sep. 30, 2021

Equity [Abstract]

Schedule of common stock issued and outstanding

The following table shows the beginning and ending balances of our issued and outstanding common stock for the three and nine months ended September 30, 2021 and 2020:

	Three Months Ended September 30,		Nine Months Ended September 30,
	2021	2020	2021	2020
Shares issued and outstanding, beginning balance	65,864,116	67,292,864	66,456,663	69,065,491
Issuance of common stock from vested restricted stock units	127,704	158,041	474,222	500,291
Issuance of common stock from exercise of stock options	29,570	25,075	59,305	65,684
Issuance of common stock for employee stock purchase plan	—	—	74,070	130,532
Repurchase of common stock	(230,456)	(521,137)	(1,155,707)	(2,688,538)
Awards effectively repurchased for required employee withholding taxes	(47,764)	(56,859)	(165,383)	(175,476)
Shares issued and outstanding, ending balance	65,743,170	66,897,984	65,743,170	66,897,984