Treasury Stock	9 Months Ended
Sep. 30, 2021
Treasury Stock.
Treasury Stock	12. Treasury Stock In January 2021 and July 2021, the Board of Directors increased the authorization under its existing stock repurchase program by $100,000 and $970,000, respectively, reflecting an aggregate authorization for share repurchases since the initiation of our program of $1,470,000. The expiration date on the repurchase authorization is December 31, 2021. Repurchases occur at the Company’s discretion. Repurchases may be made in the open market or in privately negotiated transactions, pursuant to the applicable Securities and Exchange Commission rules. The amount and timing of future share repurchases, if any, will be made as market and business conditions warrant. On March 10, 2021, the Company entered into an accelerated share repurchase (“ASR”) agreement with Morgan Stanley & Co. LLC (“Morgan Stanley”) to repurchase up to $35,000 of its outstanding shares of common stock as part of the Company’s share repurchase program. Under the ASR agreement, the Company received initial delivery of approximately 276 shares of common stock, representing approximately 80% of the number of shares of common stock initially underlying the ASR agreement based on the closing price of the common stock of $101.49, on March 9, 2021. At inception of the ASR agreement, the Company recognized the initial delivery of shares as treasury stock of $28,000, and recognized the remaining amount underlying the ASR agreement as a reduction of additional paid in capital of $7,000. The total number of shares that the Company repurchased under the ASR program was based on the volume-weighted average price of the common stock during the term of the ASR agreement, less a discount, and subject to potential adjustments pursuant to the terms and conditions of the ASR agreement. The final settlement of the share repurchases under the ASR agreement was completed on May 4, 2021 with additional delivery of 46 shares of common stock. At settlement of the ASR agreement, the Company recognized an increase to additional paid in capital and a decrease in treasury stock of $7,000 related to the remaining delivery of shares. The ASR agreement resulted in a total of 322 shares repurchased at an average cost of $108.76. On May 14, 2021, the Company entered into an ASR agreement with Morgan Stanley to repurchase up to $50,000 of its outstanding shares of common stock as part of the Company’s share repurchase program. Under the ASR agreement, the Company received initial delivery on May 17, 2021 of approximately 418 shares of common stock, representing approximately 80% of the number of shares of common stock initially underlying the ASR agreement based on the closing price of the common stock of $95.63, on May 14, 2021. At inception of the ASR agreement, the Company recognized the initial delivery of shares as treasury stock of $40,000, and recognized the remaining amount underlying the ASR agreement as a reduction to additional paid in capital of $10,000. The total number of shares that the Company will repurchase under the ASR program will be based on the volume-weighted average price of the common stock during the term of the ASR agreement, less a discount, and subject to potential adjustments pursuant to the terms and conditions of the ASR agreement. The final settlement of the share repurchases under the ASR agreement was completed on August 13, 2021 with additional delivery of 139 shares of common stock. At settlement of the ASR agreement, the Company recognized an increase to additional paid in capital and a decrease in treasury stock of $10,000 related to the remaining delivery of shares. The ASR agreement resulted in a total of 558 shares repurchased at an average cost of $89.68. During the nine months ended September 30, 2021 the Company repurchased 3,873 shares of common stock, which includes shares received as of September 30, 2021 under the ASR on March 10, 2021 and shares received under the ASR on May 17, 2021, at an aggregate cost of $354,185. At September 30, 2021, there remained $864,085 available under its current share repurchase authorization. Shares repurchased in lieu of taxes are not included in the repurchase plan totals as they were approved in conjunction with the restricted share awards.

Treasury Stock

9 Months Ended

Sep. 30, 2021

12. Treasury Stock

In January 2021 and July 2021, the Board of Directors increased the authorization under its existing stock repurchase program by $100,000 and $970,000, respectively, reflecting an aggregate authorization for share repurchases since the initiation of our program of $1,470,000. The expiration date on the repurchase authorization is December 31, 2021. Repurchases occur at the Company’s discretion. Repurchases may be made in the open market or in privately negotiated transactions, pursuant to the applicable Securities and Exchange Commission rules. The amount and timing of future share repurchases, if any, will be made as market and business conditions warrant.

On March 10, 2021, the Company entered into an accelerated share repurchase (“ASR”) agreement with Morgan Stanley & Co. LLC (“Morgan Stanley”) to repurchase up to $35,000 of its outstanding shares of common stock as part of the Company’s share repurchase program. Under the ASR agreement, the Company received initial delivery of approximately 276 shares of common stock, representing approximately 80% of the number of shares of common stock initially underlying the ASR agreement based on the closing price of the common stock of $101.49, on March 9, 2021. At inception of the ASR agreement, the Company recognized the initial delivery of shares as treasury stock of $28,000, and recognized the remaining amount underlying the ASR agreement as a reduction of additional paid in capital of $7,000. The total number of shares that the Company repurchased under the ASR program was based on the volume-weighted average price of the common stock during the term of the ASR agreement, less a discount, and subject to potential adjustments pursuant to the terms and conditions of the ASR agreement. The final settlement of the share repurchases under the ASR agreement was completed on May 4, 2021 with additional delivery of 46 shares of common stock. At settlement of the ASR agreement, the Company recognized an increase to additional paid in capital and a decrease in treasury stock of $7,000 related to the remaining delivery of shares. The ASR agreement resulted in a total of 322 shares repurchased at an average cost of $108.76.

On May 14, 2021, the Company entered into an ASR agreement with Morgan Stanley to repurchase up to $50,000 of its outstanding shares of common stock as part of the Company’s share repurchase program. Under the ASR agreement, the Company received initial delivery on May 17, 2021 of approximately 418 shares of common stock, representing approximately 80% of the number of shares of common stock initially underlying the ASR agreement based on the closing price of the common stock of $95.63, on May 14, 2021. At inception of the ASR agreement, the Company recognized the initial delivery of shares as treasury stock of $40,000, and recognized the remaining amount underlying the ASR agreement as a reduction to additional paid in capital of $10,000. The total number of shares that the Company will repurchase under the ASR program will be based on the volume-weighted average price of the common stock during the term of the ASR agreement, less a discount, and subject to potential adjustments pursuant to the terms and conditions of the ASR agreement. The final settlement of the share repurchases under the ASR agreement was completed on August 13, 2021 with additional delivery of 139 shares of common stock. At settlement of the ASR agreement, the Company recognized an increase to additional paid in capital and a decrease in treasury stock of $10,000

related to the remaining delivery of shares. The ASR agreement resulted in a total of 558 shares repurchased at an average cost of $89.68.

During the nine months ended September 30, 2021 the Company repurchased 3,873 shares of common stock, which includes shares received as of September 30, 2021 under the ASR on March 10, 2021 and shares received under the ASR on May 17, 2021, at an aggregate cost of $354,185. At September 30, 2021, there remained $864,085 available under its current share repurchase authorization. Shares repurchased in lieu of taxes are not included in the repurchase plan totals as they were approved in conjunction with the restricted share awards.