Compensation Deferrals in Current Year.

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- Definition

Percentage of Award’s Vested Share Payout on Stock Return

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No definition available.

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- Definition

Share Based Compensation Arrangement By Share Based Payment Award, Equity Instruments Other Than Options, Conversion Ratio

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No definition available.

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Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Deferred, Number of Annual Distribution Installments

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No definition available.

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- Definition

Share based compensation arrangement by share based payment award equity instruments other than options non cash compensation.

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- Definition

Share based compensation arrangement by share based payment award equity instruments other than options potential vest, maximum.

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Share based compensation arrangement by share based payment award equity Instruments other than options potential vest minimum.

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No definition available.

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

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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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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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Amount of tax benefit from exercise of option under share-based payment arrangement.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the 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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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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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Agreed-upon price for the exchange of the underlying asset relating to the share-based payment award.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Percentage of vesting of award under share-based payment arrangement.

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Intrinsic value of outstanding award under share-based payment arrangement. Excludes share and unit options.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Share-based compensation plans - Additional Information (Details) $ / shares in Units, $ in Thousands	12 Months Ended			48 Months Ended
	Dec. 31, 2023 USD ($) installment $ / shares shares	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (in shares) \| shares	5,069,768
Compensation cost for share-based payment arrangements	$ 27,780	$ 31,309	$ 22,608
Related tax benefit recognized in net income	6,920	7,999	5,715
Additional net excess tax benefit realized	$ 978	$ 1,367	$ 1,110
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, weighted-average grant date fair value (usd per share) \| $ / shares	$ 56.87
Vested units in period (in shares) \| shares	0
Performance Contingent Restricted Stock Units (PCSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum vesting period	3 years
Granted, weighted-average grant date fair value (usd per share) \| $ / shares	$ 55.04	$ 51.94	$ 55.95
Noncash stock-based compensation associated performance contingent restricted stock units	$ 10,751	$ 17,900	$ 11,477
Total unrecognized compensation cost related to nonvested awards	$ 8,746
Weighted-average period	16 months
Performance period	3 years
Stock return payout percentage	0.20
Number of common shares to be converted into for each share upon conversion	1
Vested units in period (in shares) \| shares	0
Performance Contingent Restricted Stock Units (PCSUs) \| 2023 PCSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period	3 years
Total performance contingent restricted stock units vested , minimum (in shares) \| shares	0
Total performance contingent restricted stock units, maximum (in shares) \| shares	449,255
Performance Contingent Restricted Stock Units (PCSUs) \| 2022 PCSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period	3 years
Total performance contingent restricted stock units vested , minimum (in shares) \| shares	0
Total performance contingent restricted stock units, maximum (in shares) \| shares	342,808
Performance Contingent Restricted Stock Units (PCSUs) \| 2021 PCSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of vested units	$ 12,600
Total performance contingent restricted stock units, maximum (in shares) \| shares	225,530
Performance Contingent Restricted Stock Units (PCSUs) \| 2020 PCSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of vested units		$ 17,052
Vested units in period (in shares) \| shares		280,881
Performance Contingent Restricted Stock Units (PCSUs) \| 2019 PCSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of vested units			$ 3,719
Vested units in period (in shares) \| shares			64,243
Performance Contingent Restricted Stock Units (PCSUs) \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	25.00%
Performance Contingent Restricted Stock Units (PCSUs) \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	75.00%
Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost for share-based payment arrangements	$ 0	$ 40	$ 347
Total unrecognized compensation cost related to nonvested awards	$ 0
Vesting percentage	33.33%
Aggregate intrinsic value of options and SARs exercised	$ 158	582	2,575
Weighted average remaining contractual life for SAR's, outstanding	4 years 1 month 6 days
Aggregate intrinsic value for SAR's, outstanding	$ 2,217
Fair market value of the Company’s stock used to calculate intrinsic value (usd per share) \| $ / shares	$ 55.87
Stock Appreciation Rights (SARs) \| Granted 2015 through 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum vesting period				3 years
Term of award	10 years
Deferred Compensation Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation deferrals in current year	$ 2,024	$ 2,256	$ 2,507
Executive Officers and Key Management Employees \| Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum vesting period	3 years
Executive Officers and Key Management Employees \| Restricted Stock Units (RSUs) \| Share-based Compensation Award, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	33.33%
Executive Officers and Key Management Employees \| Restricted Stock Units (RSUs) \| Share-based Compensation Award, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	33.33%
Executive Officers and Key Management Employees \| Restricted Stock Units (RSUs) \| Share-based Compensation Award, Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	33.33%
Executives and Directors \| Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum vesting period	5 years
Granted, weighted-average grant date fair value (usd per share) \| $ / shares	$ 56.87	$ 53.55	$ 57.77
Fair value of vested units	$ 10,320	$ 6,243	$ 4,063
Noncash stock-based compensation associated performance contingent restricted stock units	15,005	$ 11,113	$ 8,278
Total unrecognized compensation cost related to nonvested awards	$ 11,674
Weighted-average period	26 months
Executives and Directors \| Restricted Stock Units (RSUs) \| Share-based Compensation Award, Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	33.33%
Executives and Directors \| Restricted Stock Units (RSUs) \| Share-based Compensation Award, Tranche Four
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	33.33%
Executives and Directors \| Restricted Stock Units (RSUs) \| Share-based Compensation Award, Tranche Five
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	33.33%
Non-employee directors \| Deferred Compensation Plans \| Share-based Compensation Award, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of annual distribution installments \| installment	1
Non-employee directors \| Deferred Compensation Plans \| Share-based Compensation Award, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of annual distribution installments \| installment	3
Non-employee directors \| Deferred Compensation Plans \| Share-based Compensation Award, Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of annual distribution installments \| installment	5