Stock Based Compensation (Narrative) (Details)	1 Months Ended				12 Months Ended
	Jan. 31, 2023 $ / shares shares	Jul. 31, 2022 $ / shares shares	Jan. 31, 2022 $ / shares shares	Jul. 31, 2021 $ / shares shares	Dec. 31, 2022 USD ($) performance_metric offering_period shares	Dec. 31, 2021 USD ($) performance_metric	Dec. 31, 2020 USD ($) performance_metric
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Forfeiture rate					5.00%	5.00%	5.00%
Long-Term Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Company's common stock authorized to employees (in shares) | shares					1,840,112
Long-Term Equity Incentive Plan | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)					3 years
Unrecognized compensation cost					$ 23,300,000
Unrecognized compensation cost expected to be recognized over a weighted-average period (in years)					11 months 4 days
Compensation expense					$ 34,900,000	$ 32,800,000	$ 29,400,000
Compensation expenses income tax benefit					$ 6,400,000	$ 5,900,000	$ 5,200,000
Long-Term Equity Incentive Plan | Performance Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of payout level minimum					0.00%	0.00%	0.00%
Percentage of payout level maximum					200.00%	200.00%	200.00%
Percentage of payout level target					100.00%	100.00%	100.00%
Performance measures | performance_metric					2	2	2
Performance period					3 years
Unrecognized compensation cost					$ 27,200,000
Unrecognized compensation cost expected to be recognized over a weighted-average period (in years)					8 months 12 days
Compensation expense					$ 24,800,000	$ 31,800,000	$ 26,500,000
Compensation expenses income tax benefit					$ 3,700,000	3,300,000	2,600,000
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Company's common stock authorized to employees (in shares) | shares					5,000,000
Number of offering periods | offering_period					2
Percentage of stock price purchased					90.00%
Maximum number of shares can be purchased each offering period per employee | shares					5,000
Participants' maximum contribution per offering period					$ 7,500
Participants' maximum contribution per year					$ 15,000
Number of continuous months worked					6 months
Non temporary employee requirement (months employed)					12 months
Maximum number of days for leave of absence					90 days
Common shares issued | shares		50,385	46,460	53,802
Discounted price of shares issued (in dollars per share) | $ / shares		$ 140.64	$ 140.27	$ 118.90
Compensation expense					$ 3,000,000	2,200,000	2,000,000
Compensation expenses income tax benefit					$ 100,000	$ 100,000	$ 100,000
Subsequent Event | Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares issued | shares	65,508
Discounted price of shares issued (in dollars per share) | $ / shares	$ 112.55
Tranche one | Long-Term Equity Incentive Plan | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSU vesting terms for employees and directors					33.33%
Tranche two | Long-Term Equity Incentive Plan | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSU vesting terms for employees and directors					33.33%
Tranche three | Long-Term Equity Incentive Plan | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSU vesting terms for employees and directors					33.33%
Director | Long-Term Equity Incentive Plan | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)					3 years
Director | Tranche one | Long-Term Equity Incentive Plan | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSU vesting terms for employees and directors					33.33%
Director | Tranche two | Long-Term Equity Incentive Plan | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSU vesting terms for employees and directors					33.33%
Director | Tranche three | Long-Term Equity Incentive Plan | Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSU vesting terms for employees and directors					33.33%