Share-Based Compensation Level 4 (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total pretax employee share-based compensation expense included in net income	$ 14,168,000	$ 14,103,000	$ 15,029,000
Income tax benefit related to share-based compensation included in net income	3,537,000	$ 3,417,000	$ 3,842,000
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	$ 12,500,000
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	1,425,927
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price, Beginning Balance	$ 22.54
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable	1,425,927
Share-based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price	$ 22.54
Stock Option Plan Exercise Range 2 [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Outstanding	1,087,720
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price, Beginning Balance	$ 29.25
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable	1,087,720
Share-based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price	$ 29.25
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	1,809,995
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price, Beginning Balance	$ 39.65
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable	1,552,021
Share-based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price	$ 39.16
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	1,599,050
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price, Beginning Balance	$ 50.32
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable	309,475
Share-based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price	$ 50.82
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	5,922,692
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range, Outstanding Options, Weighted Average Exercise Price, Beginning Balance	$ 36.50
Share-based Payment Arrangement, Option, Exercise Price Range, Shares Exercisable	4,375,143
Share-based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Exercise Price	$ 32.10
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Dividend yield	1.80%	1.70%	1.70%
Risk-free interest rate	0.40%	1.40%	2.50%
Expected holding period	4 years	3 years 8 months 12 days	4 years
Total pretax employee share-based compensation expense included in net income	$ 5,514,000	$ 5,668,000	$ 6,314,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Options outstanding at beginning of period	6,912,065
Options outstanding at beginning of period, weighted average exercise price	$ 32.34
Granted	652,290
Granted, Weighted Average Exercise Price	$ 49.59
Exercised	(1,641,663)
Exercised, Weighted Average Exercise Price	$ 24.17
Options outstanding at end of period	5,922,692	6,912,065
Options outstanding at end of period, weighted average exercise price	$ 36.50	$ 32.34
Options exercisable at December 31, 2011	5,922,692	6,912,065
Options exercisable at December 31, 2011, Weighted Average Exercise Price	$ 36.50	$ 32.34
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number	4,375,143
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price	$ 32.10
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Expected volatility	23.50%	18.00%	19.80%
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	$ 6,000,000
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	$ 5,647,000	$ 5,568,000	$ 6,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Nonvested restricted shares at beginning of period	243,529
Nonvested restricted shares at beginning of period, weighted average grant date fair value	$ 45.52
Granted	113,359
Granted, Weighted Average Grant Date Fair Value	$ 49.59	$ 50.82	$ 42.73
Vested	(126,978)
Vested, Weighted Average Grant Date Fair Value	$ 43.28
Nonvested restricted shares at end of period	229,910	243,529
Nonvested restricted shares at end of period, weighted average grant date fair value	$ 48.76	$ 45.52
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	$ 5,496,000	$ 5,674,000	$ 6,718,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested	$ 3,513,000	2,100,000	3,724,000
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	$ 6,500,000
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	$ 3,007,000	$ 2,867,000	$ 2,715,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]
Nonvested restricted shares at beginning of period	135,308
Nonvested restricted shares at beginning of period, weighted average grant date fair value	$ 43.83
Granted	65,825
Granted, Weighted Average Grant Date Fair Value	$ 49.59	$ 48.89	$ 40.91
Vested	(69,321)
Vested, Weighted Average Grant Date Fair Value	$ 41.59
Nonvested restricted shares at end of period	128,171	135,308
Nonvested restricted shares at end of period, weighted average grant date fair value	$ 47.87	$ 43.83
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	$ 2,883,000	$ 2,722,000	$ 2,827,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period	(3,641)
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$ 48.34
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested	$ 1,911,000	1,004,000	1,432,000
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized	$ 3,500,000
Performance Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate	0.43%
Total pretax employee share-based compensation expense included in net income	$ 19,500,000	$ 8,600,000	$ 6,100,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Granted	111,449	112,762	125,546
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	$ 44.94
Nonvested restricted shares at end of period, weighted average grant date fair value	$ 70.99	$ 44.94
Expected volatility	33.60%
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition	1 year 6 months