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Stock-Based Compensation (Stock-Based Compensation Costs) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Share-Based Payment Arrangement, Noncash Expense [Abstract] |  |  |
Stock or Unit Option Plan Expense | $ 0.1 | $ 0.1 | $ 0.1
Stock Appreciation Rights Expense | 0.9 | 11.6 | 6.6
Allocated Share-based Compensation Expense | 1.9 | 12.2 | 7.1
Share-based Payment Arrangement, Expense, Tax Benefit | (0.2) | (1.5) | 0.0
Restricted Stock Units (RSUs) [Member] |  |  |
Share-Based Payment Arrangement, Noncash Expense [Abstract] |  |  |
Restricted Stock or Unit Expense | 0.7 | 0.5 | 0.4
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Restricted Stock or Unit Expense | 0.7 | 0.5 | 0.4
Restricted Stock |  |  |
Share-Based Payment Arrangement, Noncash Expense [Abstract] |  |  |
Restricted Stock or Unit Expense | 0.2 | 0.0 | 0.0
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Restricted Stock or Unit Expense | $ 0.2 | $ 0.0 | $ 0.0

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- Definition Stock Appreciation Rights Expense + References No definition available. + Details
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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Amount of tax benefit for recognition of expense of award under share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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- Definition Amount of noncash expense for award of restricted stock or unit under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 + Details
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- Definition Amount of noncash expense for option under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 + Details
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