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Repurchases of Common Stock (Tables) | 12 Months Ended
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Dec. 31, 2020
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 surrenders:
(in thousands, except per share amounts) |  | For the Years Ended December 31,
|  | 2020 |  | 2019 |  | 2018
Shares repurchased in the open market |  | 721 |  |  | 1,215 |  |  | 1,773 |
Shares acquired through employee surrenders for statutory tax withholding |  | 58 |  |  | 39 |  |  | 52 |
Total shares repurchased |  | 779 |  |  | 1,254 |  |  | 1,825 |
Cost of shares repurchased in the open market |  | $ | 179,623 |  |  | $ | 303,838 |  |  | $ | 368,691 |
Cost of shares for employee surrenders |  | 20,603 |  |  | 8,054 |  |  | 9,375 |
Total cost of shares |  | $ | 200,226 |  |  | $ | 311,892 |  |  | $ | 378,066 |
Average cost per share - open market repurchases |  | $ | 249.20 |  |  | $ | 249.84 |  |  | $ | 207.92 |
Average cost per share - employee surrenders |  | $ | 354.98 |  |  | $ | 210.10 |  |  | $ | 182.18 |
Average cost per share - total |  | $ | 257.08 |  |  | $ | 248.62 |  |  | $ | 207.19 |

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- Definition Tabular disclosure of treasury stock, including, but not limited to, average cost per share, description of share repurchase program, shares repurchased, shares held for each class of treasury stock. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23309-112656 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656 + Details
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