Share-Based Compensation - Schedule of Grants (Details) - Restricted Stock - 2015 Equity Plan - $ / shares	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Time Based | Key Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	220,858	203,210
Grant date fair value per share (in dollars per share)	$ 137.14	$ 179.23
Time Based | Executive Officers
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	62,800	66,000
Grant date fair value per share (in dollars per share)	$ 144.88	$ 178.20
Time Based | Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	16,000	11,900
Grant date fair value per share (in dollars per share)	$ 148.12	$ 197.00
Market Condition | Executive Officers
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	82,200	91,500
Grant date fair value per share (in dollars per share)	$ 108.60	$ 124.88