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Stock-Based Compensation - Equity Compensation Plans (Details) - USD ($) $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2021
Stock-Based Compensation Details |  |  |
Stock-based compensation | $ 4.0 | $ 4.0 |
Stock-based compensation liability | $ 11.0 |  | $ 0.0
Equity Compensation Plan |  |  |
Stock-Based Compensation Details |  |  |
Shares available for grant (in shares) | 164,000 |  |
Equity Compensation Plan | Certain members of the Company's Board of Directors |  |  |
Stock-Based Compensation Details |  |  |
Maximum annual grant share limit (in shares) | 125,000 |  |
Equity Compensation Plan | Certain members of the Company's Board of Directors | Share-Based Payment Arrangement, Nonemployee |  |  |
Stock-Based Compensation Details |  |  |
Maximum annual grant share limit (in shares) | 20,000 |  |

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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 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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