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Stock Compensation (Narrative) (Details) |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Aug. 11, 2020 shares | Dec. 31, 2020 USD ($) | Dec. 31, 2021 USD ($) item shares | Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 USD ($) shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of performance stock unit grants | item |  |  | 2 |  |
Percentage of target number of shares of common stock granted as Performance Stock Units |  |  |  | 83.00% |
Total fair value | $ |  |  | $ 7,300,000 | $ 6,700,000 | $ 9,800,000
Employees purchased common stock, shares |  |  | 87,000 | 83,000 | 61,000
Capitalized stock compensation expense | $ |  |  | $ 566,000 | $ 592,000 | $ 612,000
Reversal in expense | $ |  |  | $ 1,900,000 |  |
ESPP Options [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
ESPP, percentage of market price for eligible employees |  |  | 85.00% |  |
RSAs, RSUs, And PSUs [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Authorized awards from approved stock incentive plans |  |  | 500,000 | 335,000 |
Aggregate grant date market value | $ |  |  | $ 12,600,000 | $ 8,300,000 |
Stock Options [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Grants of stock options |  |  | 226,000 | 212,000 | 169,000
Unrecognized compensation costs | $ |  |  | $ 2,000,000.0 |  |
Expected weighted-average period for recognizing the unrecognized compensation costs, in years |  |  | 1 year 6 months 25 days |  |
RSAs, RSUs, PSUs, And PSAs [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Authorized awards from approved stock incentive plans |  |  |  | 507,000 |
Aggregate grant date market value | $ |  |  |  | $ 15,000,000.0 |
Unrecognized compensation costs | $ |  |  | $ 9,100,000 |  |
Restricted Stock Awards (RSAs) [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Authorized awards from approved stock incentive plans |  |  | 140,000 | 123,000 | 93,000
Expected weighted-average period for recognizing the unrecognized compensation costs, in years |  |  | 1 year 2 months 23 days |  |
Restricted Stock Units (RSUs) [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Authorized awards from approved stock incentive plans |  |  | 144,000 | 141,000 | 103,000
Expected weighted-average period for recognizing the unrecognized compensation costs, in years |  |  | 1 year 7 months 20 days |  |
Performance Stock Units (PSUs) [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Authorized awards from approved stock incentive plans |  |  | 215,000 | 70,000 | 322,000
Expected weighted-average period for recognizing the unrecognized compensation costs, in years |  |  | 10 months 24 days |  |
Short-term PSUs [Member] |  |  |  |  |
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% |
Long-term PSUs [Member] | Share-based Payment Arrangement, Tranche Two [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting period |  |  | 5 years |  |
PSU [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Number of performance stock unit grants | item |  |  | 2 |  |
Annual PSU [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award performance period |  |  | 1 year |  |
Annual PSU [Member] | Share-based Payment Arrangement, Tranche One [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting percentage |  |  | 102.00% |  |
Special PSU [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Award performance period |  |  | 1 year |  |
Special PSU [Member] | Share-based Payment Arrangement, Tranche One [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting percentage |  |  | 118.00% |  |
Maximum [Member] | Short-term PSUs [Member] |  |  |  |  |
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% |
Maximum [Member] | Long-term PSUs [Member] |  |  |  |  |
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 |  |  |  | 288.00% |
Maximum [Member] | Annual PSU [Member] | Share-based Payment Arrangement, Tranche One [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting percentage |  |  | 150.00% |  |
Maximum [Member] | Special PSU [Member] | Share-based Payment Arrangement, Tranche One [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Vesting percentage |  |  | 200.00% |  |
Executive Officer [Member] | Maximum [Member] | Long-term PSUs [Member] |  |  |  |  |
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 |  |  |  | 192.00% |
2009 Equity And Cash Incentive Plan [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Increase in shares authorized under plan |  |  |  | 1,900,000 |
Grants of stock options | 1,400,000 |  |  |  |
2020 Equity and Cash Incentive Plan [Member] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |
Increase in shares authorized under plan | 4,100,000 |  |  |  |
Authorized awards from approved stock incentive plans |  |  | 2,700,000 |  |
2020 PSU Plan [Member] |  |  |  |  |
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% |
Compensation expense | $ |  |  |  | $ 1,300,000 |
Reversal in expense | $ |  | $ 1,100,000 |  |  |

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