Stock-Based Compensation Plans - Stock Options Granted (Details) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Shares
Granted (in shares)			4,847
Exercised (in shares)	(5,773)
2009 Plan | Stock Options
Shares
Options outstanding at the beginning of the period (in shares)	293,813	299,149	12,506
Granted (in shares)	15,744	9,793	294,115
Exercised (in shares)	(5,773)	(8,670)	(2,759)
Forfeited (in shares)	0	(6,459)	(4,713)
Options outstanding at the end of the period (in shares)	303,784	293,813	299,149
Options exercisable at the end of the period (in shares)	279,894	6,533	9,747
Weighted average exercise price per share
Options outstanding at the beginning of the period (in dollars per share)	$ 181.85	$ 178.71	$ 129.35
Granted (in dollars per share)	177.83	236.14	180.32
Exercised (in dollars per share)	163.56	135.78	124.34
Forfeited (in dollars per share)	0	180.32	180.32
Options outstanding at the end of the period (in dollars per share)	181.99	181.85	178.71
Options exercisable at the end of the period (in dollars per share)	$ 180.97	$ 165.51	$ 130.77