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Repurchases of Common Stock (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Equity [Abstract] |  |
Shares repurchased in the open market (in shares) | 502 | 277
Shares acquired through employee surrender for statutory tax withholding (in shares) | 21 | 28
Total shares repurchased (in shares) | 523 | 305
Cost of shares repurchased in the open market | $ 262,783 | $ 139,213
Cost of shares for employee surrenders | 10,338 | 14,983
Total cost of shares | $ 273,121 | $ 154,196
Average cost per share - open market repurchases (in USD per share) | $ 523.04 | $ 501.62
Average cost per share - employee surrenders (in USD per share) | 505.53 | 544.08
Average cost per share - total (in USD per share) | $ 522.36 | $ 505.45

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