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Stock Option Rollforward Table (Details) - $ / shares | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
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Beginning outstanding, shares | 103,641 | 351,561 | 395,353
Exercised | 0 | (247,920) | (43,792)
Ending outstanding, shares | 103,641 | 103,641 | 351,561
Beginning outstanding, Weighted-average Exercise Price | $ 97.01 | $ 96.97 | $ 96.37
Weighted Average Exercise Price | 0 | 96.95 | 91.60
Ending outstanding, Weighted-average Exercise Price | $ 97.01 | $ 97.01 | $ 96.97

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- Definition Number of options outstanding, including both vested and non-vested options. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(ii) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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