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Repurchases of Common Stock (Tables)
6 Months Ended
Jun. 30, 2021
Equity [Abstract]  
Schedule of common stock repurchases
The following is a summary of our open market common stock repurchases, reported on a trade date basis, and shares acquired through employee surrender:
(in thousands, except per share amounts)
For the Three Months Ended
June 30,
For the Six Months Ended
June 30,
2021202020212020
  
Shares repurchased in the open market341 — 618 721 
Shares acquired through employee surrender for statutory tax withholding (1)
— — 28 30 
Total shares repurchased341 — 646 751 
Cost of shares repurchased in the open market$188,409 $— $327,622 $179,623 
Cost of shares for employee surrenders65 14,986 8,669 
Total cost of shares$188,412 $65 $342,608 $188,292 
Average cost per share - open market repurchases$552.08 $— $529.45 $249.20 
Average cost per share - employee surrenders$550.59 $312.19 $544.08 $288.94 
Average cost per share - total$552.08 $312.19 $530.07 $250.79 
(1) For the quarters ended June 30, 2021 and 2020, the number of shares acquired though employee surrender for statutory tax withholding were below rounding thresholds.