Compensation Related Costs, Share Based Payments (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-Based Payment Arrangement [Abstract]
Common Stock, Capital Shares Reserved for Future Issuance	4,300,000
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant	1,800,000
Share-Based Payment Arrangement, Expense, after Tax	$ 7,800	$ 6,800	$ 7,500
Share-Based Payment Arrangement, Expense, Tax Benefit	$ 2,600	2,300	$ 2,500
Restricted Stock Units (RSUs)
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period	3 years
Forfeiture Rate Maximum In Hundredths	3.00%
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 4,000	$ 3,700
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	1 year 9 months 18 days	1 year 9 months 18 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number	126,948	116,633
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period	48,841
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period	(31,328)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested Options Forfeited, Number of Shares	(7,198)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 77.50	$ 79.32
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	81.79	$ 76.96	$ 72.69
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value	90.94
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$ 77.65
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Fair Value Of Shares Granted	$ 3,995	$ 4,342	$ 3,660
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Fair Value Of Shares Vested	$ 2,800	2,900	$ 3,400
Performance Shares
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period	3 years
Forfeiture Rate Maximum In Hundredths	3.00%
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 9,700	$ 8,000
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	1 year 9 months 18 days	1 year 9 months 18 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number	247,326	214,537
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period	95,474
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period	(50,188)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Nonvested Options Forfeited, Number of Shares	(12,497)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 95.23	$ 92.47
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value	105.74	$ 95.80	$ 82.51
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value	102.77
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value	$ 97.91
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Fair Value Of Shares Granted	$ 10,095	$ 8,360	$ 8,860
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Fair Value Of Shares Vested	$ 3,700	$ 5,200	$ 7,200
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate	29.20%	34.00%	32.70%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate	3.18%	3.22%	3.19%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	4.37%	1.65%	0.20%
Employee Stock
Share-Based Payment Arrangement [Abstract]
Common Stock, Capital Shares Reserved for Future Issuance	1,250,000
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Maximum Allowable Percentage Of Annual Base Pay Withheld To Purchase Our Common Stock	10.00%
Purchase Price Percentage Of Lower O fIts Grant Date Or Exercise Date Market Price In Hundredths	85.00%
Percent of employees who participated in the Employee Stock Purchase Plan	45.00%	42.00%	44.00%
Shares sold under employee stock purchase plan	108,875	86,657	89,240
Share price of shares sold under Employee Stock Purchase Plan in dollars per share	$ 58.98	$ 65.21	$ 63.41
Share-Based Payment Arrangement, Expense	$ 1,200	$ 1,100	$ 1,100

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Maximum Allowable Percentage Of Annual Base Pay Withheld To Purchase Our Common Stock

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Percent of employees who participated in the Employee Stock Purchase Plan

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Purchase Price Percentage Of Lower O fIts Grant Date Or Exercise Date Market Price In Hundredths

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Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Fair Value Of Shares Granted

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Share price of shares sold under Employee Stock Purchase Plan in dollars per share

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Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Aggregate number of common shares reserved for future issuance.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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