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Earnings Per Common Share and Share Awards (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Earnings Per Common Share And Share Awards [Line Items] |  |
Anti-dilutive shares excluded from computation of diluted earnings per share | 18 | 14
Number of stock options or SARs granted where exercise price was less than market price on date of grant | 0 | 0
Options and SARs vested | 6 |
Fair value of options and SARs vested | $ 362 |
Weighted-average fair values for SARs issued (dollars per share) | $ 62.60 | $ 59.83
Compensation expense relating to SARs or options vesting | $ 362 | $ 299
Total unrecognized compensation cost related to unvested share-based compensation arrangements granted under stock award plans | $ 540 |
Maximum |  |
Earnings Per Common Share And Share Awards [Line Items] |  |
Maximum shares of Company stock to be granted to key employees or directors | 250 |
SARs |  |
Earnings Per Common Share And Share Awards [Line Items] |  |
Intrinsic values of options exercised | $ 496 | $ 484
SARs | Maximum |  |
Earnings Per Common Share And Share Awards [Line Items] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period | 7 years |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period | 5 years |

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- Definition Number of stock options or SARs granted where exercise price was less than market price on date of grant. + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=122041274&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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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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