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STOCKHOLDERS' EQUITY
 12 Months Ended
Dec. 31, 2022
Equity [Abstract]  
STOCKHOLDERS' EQUITY STOCKHOLDERS' EQUITY
Common Stock
The following table shows the beginning and ending balances of our issued and outstanding common stock for the year ended December 31, 2022, 2021, and 2020:
Year Ended
December 31,
202220212020
Shares issued and outstanding, beginning balance65,968,224 66,456,663 69,065,491 
Issuance of common stock from vested restricted stock units841,861 748,881 659,689 
Issuance of common stock from exercise of stock options
116,592 73,118 81,026 
Issuance of common stock for employee stock purchase plan
158,134 136,861 236,887 
Issuance of common stock for the acquisition of Zenefits193,221 — — 
Repurchase of common stock
(6,398,279)(1,161,909)(3,307,074)
Awards effectively repurchased for required employee withholding taxes
(324,092)(285,390)(279,356)
Shares issued and outstanding, ending balance
60,555,661 65,968,224 66,456,663 
Stock Repurchases
In February 2020, our board of directors authorized a $300 million incremental increase to our ongoing stock repurchase program. In February 2022 and November 2022, our board of directors authorized a further $300 million and $200 million, respectively, incremental increase to this stock repurchase program. In February 2023, our board of directors authorized a further $300 million incremental increase to this stock repurchase program. This repurchase authorization has no expiration.
On March 17, 2022, we completed a tender offer through which we repurchased 3,653,690 shares of common stock at a price of $86.50 per share, for total consideration of approximately $319 million, which includes costs directly attributable to the purchase. On December 6, 2022. we completed a second tender offer and purchased 1,515,258 shares of common stock at a price of $72.00 per share, for total consideration of approximately $111 million, which includes costs directly attributable to the purchase.
We retire shares in the period they are acquired and account for the payment as a reduction to stockholders' equity.
The following table summarizes the share repurchases under this program for the years ended December 31, 2022, 2021 and 2020:
Year Ended
December 31,
202220212020
Total cost (in millions)$519 $94 $178 
Total shares6,398,279 1,161,909 3,307,074 
Average price per share$81.07 $81.13 $53.85 
As of December 31, 2022, $245 million remains available for repurchase under all authorizations approved by the board of directors.