v3.26.3
Stock-Based Compensation Plans - Schedule of Plans' Restricted and Performance Share Award Activity (Details) - $ / shares
 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Restricted Shares    
Common Shares    
Outstanding, beginning of the period (in shares) 888,398 880,866
Granted (in shares) 267,358 256,762
Vested and issued (in shares) (289,049) (218,276)
Forfeited or canceled (in shares) (30,623) (24,156)
Outstanding, end of the period (in shares) 836,084 895,196
Vested, but deferred (in shares) 103,330 101,820
Weighted Average Grant-Date Fair Value    
Outstanding, beginning of period (usd per share) $ 101.63 $ 90.95
Granted (usd per share) 153.36 133.15
Vested and issued (usd per share) 93.58 94.41
Forfeited or canceled (usd per share) 126.66 109.48
Outstanding, end of period (usd per share) 120.23 101.71
Vested, but deferred (usd per share) $ 56.63 $ 55.31
Performance-based Stock    
Common Shares    
Outstanding, beginning of the period (in shares) 377,757 454,017
Granted (in shares) 86,224 88,257
Added by performance factor at vesting (in shares) 9,242 75,461
Vested and issued (in shares) (196,899) (230,957)
Forfeited or canceled (in shares) (2,576) (8,218)
Outstanding, end of the period (in shares) 273,748 378,560
Vested, but deferred (in shares) 0 13,283
Weighted Average Grant-Date Fair Value    
Outstanding, beginning of period (usd per share) $ 102.38 $ 93.57
Granted (usd per share) 148.35 134.58
Added by performance factor at vesting (usd per share) 0 0
Vested and issued (usd per share) 90.33 95.26
Forfeited or canceled (usd per share) 121.03 107.24
Outstanding, end of period (usd per share) 125.98 102.35
Vested, but deferred (usd per share) $ 0 $ 40.87