Share-Based Compensation - Schedule of Grants (Details) - Restricted Stock - 2015 Equity Plan - $ / shares	6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022
Time Based | Key Employees
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares granted (in shares)	220,558	194,260
Grant date fair value per share (in dollars per share)	$ 137.15	$ 180.33
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