Stock-Based Compensation Plans - Schedule of Plans' Restricted and Performance Share Award Activity (Details) - $ / shares	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Restricted Shares
Common Shares
Outstanding, beginning of the period (in shares)	880,866	746,123
Granted (in shares)	256,762	405,506
Vested and issued (in shares)	(218,276)	(238,002)
Expired, canceled or forfeited (in shares)	(24,156)	(17,885)
Outstanding, end of the period (in shares)	895,196	895,742
Vested, but deferred (in shares)	101,820	100,281
Weighted Average Grant-Date Fair Value
Outstanding, beginning of period (usd per share)	$ 90.95	$ 79.60
Granted (usd per share)	133.15	99.78
Vested and issued (usd per share)	94.41	70.14
Canceled or forfeited (usd per share)	109.48	92.77
Outstanding, end of period (usd per share)	101.71	90.99
Vested, but deferred (usd per share)	$ 55.31	$ 54.19
Performance-based Stock
Common Shares
Outstanding, beginning of the period (in shares)	454,017	553,026
Granted (in shares)	88,257	111,398
Added by performance factor at vesting (in shares)	75,461	96,952
Vested and issued (in shares)	(230,957)	(296,243)
Expired, canceled or forfeited (in shares)	(8,218)	(5,304)
Outstanding, end of the period (in shares)	378,560	459,829
Vested, but deferred (in shares)	13,283	21,688
Weighted Average Grant-Date Fair Value
Outstanding, beginning of period (usd per share)	$ 93.57	$ 79.69
Granted (usd per share)	134.58	100.44
Added by performance factor at vesting (usd per share)	96.51	58.78
Vested and issued (usd per share)	95.26	58.76
Canceled or forfeited (usd per share)	107.24	95.77
Outstanding, end of period (usd per share)	102.35	93.61
Vested, but deferred (usd per share)	$ 40.87	$ 44.21