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Share-Based Compensation - Schedule of Grants (Details) - Restricted Stock - $ / shares | 6 Months Ended
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Jun. 30, 2024 | Jun. 30, 2023
2015 Equity Plan | Time Based | Key Employees |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Shares granted (in shares) | 205,540 | 220,558
Grant date fair value per share (in dollars per share) | $ 132.10 | $ 137.15
2015 Equity Plan | Time Based | Executive Officers |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Shares granted (in shares) | 31,800 | 62,800
Grant date fair value per share (in dollars per share) | $ 132.13 | $ 144.88
2015 Equity Plan | Market Condition | Executive Officers |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Shares granted (in shares) | 41,400 | 82,200
Grant date fair value per share (in dollars per share) | $ 98.14 | $ 108.60
Two Thousand and Four Director Plan | Time Based | Directors |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Shares granted (in shares) | 20,000 | 16,000
Grant date fair value per share (in dollars per share) | $ 129.47 | $ 148.12
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Deferred | 6,000 | 2,000

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- Definition The number of shares deferred during the period on other than stock (or unit) option plans + References No definition available. + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(01) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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- Definition Line items represent financial concepts included in a table. 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