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Common Stock and Earnings per Share - Schedule of Antidilutive Shares Excluded from Computation of Diluted Earnings per Share (Details) - shares | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Shares Underlying Stock Options Excluded |  |  |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |  |  |  |
Shares excluded from diluted earnings per share (shares) |  | 838,000 | 1,996,000 | 622,000
Performance Stock Grants Excluded because Performance Conditions Have Not Been Met |  |  |  |
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items] |  |  |  |
Shares excluded from diluted earnings per share (shares) | [1] | 335,000 | 578,000 | 717,000
[1] | Compensation cost is recognized for these performance stock grants based on expected achievement rates; however no consideration is given for these performance stock grants when calculating earnings per share until the performance measurements are actually achieved.

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 + Details
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- Definition 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. + References No definition available. + Details
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