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Share repurchases Share Repurchases (Tables) | 6 Months Ended
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Jun. 30, 2022
Treasury Stock, Value [Abstract] |
Class of Treasury Stock [Table Text Block] | The following table summarizes the Company's common stock repurchases during the three and six months ended June 30, 2022 and 2021:
| Three months ended June 30, |  | Six months ended June 30,
| 2022 |  | 2021 |  |  | 2022 |  | 2021 |
Open market repurchases: |  |  |  |  |  |  |  |  |
Shares repurchased | 3,869 |  |  | 2,070 |  |  |  | 5,973 |  |  | 5,019 |  |
Amount paid | $ | 369,740 |  |  | $ | 240,897 |  |  |  | $ | 603,058 |  |  | $ | 563,230 |  |
Average paid per share | $ | 95.56 |  |  | $ | 116.38 |  |  |  | $ | 100.96 |  |  | $ | 112.21 |  |

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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 https://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 https://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 https://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 https://asc.fasb.org/extlink&oid=6405834&loc=d3e23285-112656 + Details
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