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Share-Based Compensation - Schedule of Grants (Details) - Restricted Stock - $ / shares	6 Months Ended
	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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