Number of performance stock unit grants.

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Target percentage of shares of common stock granted as performance stock units, based on the attainment of specified levels of adjusted EBITDA.

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Share Based Compensation Arrangement By Share Based Payment Award, Award Performance Period

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Market value of share based compensation arrangement by share based payment award other than options granted during the period.

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

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Amount of cost capitalized for 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 cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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Amount of cost to be recognized for option under share-based payment arrangement.

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Amount of noncash expense (reversal of expense) for pension benefits. Excludes other postretirement benefits.

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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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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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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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Number of additional shares authorized for issuance under share-based payment arrangement.

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Gross number of share options (or share units) granted during the period.

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

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Number of shares issued during the period as a result of an employee stock purchase plan.

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Stock Compensation (Narrative) (Details) $ in Thousands			1 Months Ended	12 Months Ended
Stock Compensation (Narrative) (Details) $ in Thousands	Feb. 13, 2023	Aug. 11, 2020 shares	Feb. 28, 2021	Dec. 31, 2022 USD ($) item shares	Dec. 31, 2021 USD ($) item shares	Dec. 31, 2020 USD ($) shares	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total fair value \| $				$ 5,800	$ 7,300	$ 6,700
Employees purchased common stock, shares				95,000	87,000	83,000
Capitalized stock compensation expense \| $				$ 598	$ 566	$ 592
RSAs, RSUs, And PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized awards from approved stock incentive plans				871,000	500,000	335,000
Aggregate grant date market value \| $				$ 13,500	$ 12,600	$ 8,300
Unrecognized compensation costs \| $				$ 11,300
PSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of performance stock unit grants \| item				2	2
Annual PSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award performance period				1 year	1 year
Annual PSU \| Share-based Payment Arrangement, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage				51.00%	110.00%
Annual PSU \| Share-based Payment Arrangement, Tranche One \| Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	89.00%
Special PSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award performance period					1 year
Special PSU \| Share-based Payment Arrangement, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage				140.00%	118.00%
LTIP PSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award performance period							5 years
LTIP PSU \| Share-based Payment Arrangement, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage				136.00%
LTIP PSU \| Share-based Payment Arrangement, Tranche One \| Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage				108.00%
Short-term PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of target number of shares of common stock granted as Performance Stock Units						150.00%
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants of stock options				1,031,000	226,000	212,000
Unrecognized compensation costs \| $				$ 5,400
Expected weighted-average period for recognizing the unrecognized compensation costs, in years				2 years 3 months 25 days
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized awards from approved stock incentive plans				643,000	144,000	141,000
Expected weighted-average period for recognizing the unrecognized compensation costs, in years				2 years 3 months 7 days
Restricted Stock Awards (RSAs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized awards from approved stock incentive plans				64,000	140,000	123,000
Expected weighted-average period for recognizing the unrecognized compensation costs, in years				7 months 28 days
Performance Stock Units (PSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized awards from approved stock incentive plans				182,000	215,000	70,000
Expected weighted-average period for recognizing the unrecognized compensation costs, in years				8 months 1 day
Maximum \| Annual PSU \| Share-based Payment Arrangement, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage				150.00%	150.00%
Maximum \| Special PSU \| Share-based Payment Arrangement, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage				200.00%	200.00%
Maximum \| LTIP PSU \| Share-based Payment Arrangement, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage							288.00%
Maximum \| LTIP PSU \| Share-based Payment Arrangement, Tranche One \| Executive Officer
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage							192.00%
2020 Equity and Cash Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized awards from approved stock incentive plans						2,700,000
Increase in shares authorized under plan		4,100,000
2009 Employee Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grants of stock options		1,400,000
LTIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Reversal in expense \| $						$ 1,900
2020 PSU Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Authorized awards from approved stock incentive plans					70,000
Percentage of target number of shares of common stock granted as Performance Stock Units			100.00%
Reversal in expense \| $						$ 1,100
Compensation expense \| $					$ 1,300