Share Based Compensation (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2019	Jan. 25, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Repurchased During Period, Shares	24,520	472,609	131,300
Number of shares authorized for awards	5,100,000
Number of shares available for future issuance	2,000,000
Share-based compensation expense	$ 18,300,000	$ 12,700,000	$ 17,400,000
Tax benefit from share-based compensation expense	$ 4,600,000	$ 3,200,000	4,400,000
Award vesting period	3 years
Units outstanding	997,281	1,001,000
Proceeds from Stock Options Exercised	$ 22,300,000	$ 30,900,000	21,900,000
Portion of an award vesting for the 2012 SAR grant				1/3 vesting after each year
Award vesting percentage				33.33%
Payments for Repurchase of Common Stock	$ 2,600,000	$ 47,200,000	$ 13,100,000
Stock Repurchase Program, Authorized Amount					$ 300,000,000
Stock Options SARs Granted Since 2004 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum granting period for stock option	7 years
Stock Option SAR Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost not yet recognized	$ 7,800,000
Compensation cost not yet recognized, period for recognition	1 year 8 months 12 days
Restricted Stock and Performance Share Awards [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	3 years
Compensation cost not yet recognized	$ 9,300,000
Compensation cost not yet recognized, period for recognition	1 year 8 months 12 days
Fair value of restricted stock units and performance shares vested during period	$ 9,700,000	$ 7,700,000	$ 11,600,000
Phantom Stock Units [Member] | Non-employee directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Units granted during period	15,118
Number of shares outstanding	253,325
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of restricted stock units and performance shares vested during period	$ 77.87
Units granted during period	33
Number of shares outstanding	100	108
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of restricted stock units and performance shares vested during period	$ 87.57
Units granted during period	37
Number of shares outstanding	97	73
Share-Based Payment Arrangement, Cash Used to Settle Award	$ 4,100,000	$ 5.5	$ 5.6
Share-Based Payment Arrangement, Cash Used to Settle Award	$ 4,100,000	$ 5.5	$ 5.6
Series A and Series B preferred Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Preferred Stock, Shares Authorized	5,000,000
Preferred Stock, Par or Stated Value Per Share	$ 1.00