Share-Based Compensation Level 4 (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected holding period	4 years 9 months 18 days	4 years 6 months
Total pretax employee share-based compensation expense included in net income	$ 17,163,000	$ 15,423,000	$ 14,709,000
Income tax benefit related to share-based compensation included in net income	$ 3,982,000	$ 3,822,000	$ 3,877,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	1 year 9 months 18 days
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	$ 7,000,000.0
Stock Option Plan Exercise Range 1 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding	3,643,548
Share-based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Remaining Contractual Term	3 years 10 months 24 days
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price, Beginning Balance	$ 53.00
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable	2,902,692
Share-based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price	$ 49.19
Stock Option Plan Exercise Range 3 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding	984,847
Share-based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Remaining Contractual Term	1 year 7 months 6 days
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price, Beginning Balance	$ 39.98
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable	984,847
Share-based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price	$ 39.98
Stock Option Plan Exercise Range 4 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding	1,370,506
Share-based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Remaining Contractual Term	3 years 7 months 6 days
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price, Beginning Balance	$ 50.29
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable	1,370,506
Share-based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price	$ 50.29
Stock Option Plan Exercise Range 5 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding	535,931
Share-based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Remaining Contractual Term	5 years 1 month 6 days
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price, Beginning Balance	$ 59.76
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable	376,888
Share-based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price	$ 59.76
Stock Option Plan Exercise Range 6
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding	752,264
Share-based Payment Arrangement, Option, Exercise Price Range, Outstanding, Weighted Average Remaining Contractual Term	6 years 7 months 6 days
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price, Beginning Balance	$ 70.16
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable	170,451
Share-based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price	$ 70.28
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield	1.80%	1.60%	1.50%
Risk-free interest rate	4.30%	4.00%	1.80%
Expected holding period			4 years
Total pretax employee share-based compensation expense included in net income	$ 6,701,000	$ 5,929,000	$ 5,738,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding at beginning of period	4,906,195
Options outstanding at beginning of period, weighted average exercise price	$ 45.44
Granted	383,300
Granted, Weighted Average Exercise Price	$ 69.98
Exercised	(1,645,947)
Exercised, Weighted Average Exercise Price	$ 34.44
Options outstanding at end of period	3,643,548	4,906,195
Options outstanding at end of period, weighted average exercise price	$ 53.00	$ 45.44
Options exercisable at December 31, 2011	3,643,548	4,906,195
Options exercisable at December 31, 2011, Weighted Average Exercise Price	$ 53.00	$ 45.44
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	2,902,692
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	$ 49.19
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Expected volatility	25.70%	25.40%	23.90%
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	1 year 8 months 12 days
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	$ 6,700,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total pretax employee share-based compensation expense included in net income	$ 6,743,000	$ 6,128,000	$ 5,739,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Nonvested restricted shares at beginning of period	186,773
Nonvested restricted shares at beginning of period, weighted average grant date fair value	$ 62.95
Granted	98,591
Granted, Weighted Average Grant Date Fair Value	$ 69.98	$ 70.34	$ 59.76
Vested	(110,375)
Vested, Weighted Average Grant Date Fair Value	$ 60.58
Nonvested restricted shares at end of period	174,989	186,773
Nonvested restricted shares at end of period, weighted average grant date fair value	$ 68.41	$ 62.95
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	$ 6,687,000	$ 6,130,000	$ 5,639,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested	$ 2,155,000	1,715,000	2,552,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	1 year 9 months 18 days
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	$ 7,200,000
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total pretax employee share-based compensation expense included in net income	$ 3,720,000	$ 3,366,000	$ 3,232,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Nonvested restricted shares at beginning of period	109,708
Nonvested restricted shares at beginning of period, weighted average grant date fair value	$ 62.96
Granted	60,139
Granted, Weighted Average Grant Date Fair Value	$ 69.98	$ 70.34	$ 59.76
Vested	(60,490)
Vested, Weighted Average Grant Date Fair Value	$ 60.02
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	5,403
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$ 68.35
Nonvested restricted shares at end of period	103,954	109,708
Nonvested restricted shares at end of period, weighted average grant date fair value	$ 68.42	$ 62.96
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	$ 3,634,000	$ 3,221,000	$ 3,143,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested	1,188,000	1,000,000	1,447,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	$ 4,100,000
Performance Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	4.26%
Total pretax employee share-based compensation expense included in net income	$ 10,800,000	$ 11,800,000	$ 14,600,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Granted	96,761	88,084	99,923
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Nonvested restricted shares at beginning of period, weighted average grant date fair value	$ 69.55
Nonvested restricted shares at end of period, weighted average grant date fair value	$ 80.76	$ 69.55
Expected volatility	24.60%
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	1 year 8 months 12 days