Stock-Based Compensation Plans - Stock Options Granted (Details) - $ / shares	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Shares
Exercised (in shares)	(41,619)
2009 Plan | Stock Options
Shares
Options outstanding at the beginning of the period (in shares)	303,784	293,813	299,149
Granted (in shares)	13,759	15,744	9,793
Exercised (in shares)	(41,619)	(5,773)	(8,670)
Forfeited (in shares)	0	0	(6,459)
Expired (in shares)	(5,062)
Options outstanding at the end of the period (in shares)	270,862	303,784	293,813
Options exercisable at the end of the period (in shares)	246,877	279,894	6,533
Weighted average exercise price per share
Options outstanding at the beginning of the period (in dollars per share)	$ 181.99	$ 181.85	$ 178.71
Granted (in dollars per share)	172.11	177.83	236.14
Exercised (in dollars per share)	179.89	163.56	135.78
Forfeited (in dollars per share)	0	0	180.32
Expired (in dollars per share)	180.32
Options outstanding at the end of the period (in dollars per share)	181.84	181.99	181.85
Options exercisable at the end of the period (in dollars per share)	$ 181.82	$ 180.97	$ 165.51