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Stock-Based Compensation Plans (Schedule of Compensation Expense) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
RSUs |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Compensation expense(1) | $ 962 | $ 724 | $ 610
Income tax benefit | 207 | 156 | 131
Fair value of grants vested | 803 | 622 | 506
Restricted Stock |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Compensation expense(1) | 1,225 | 1,053 | 895
Income tax benefit | 263 | 226 | 192
Fair value of grants vested | 1,187 | 1,014 | 901
Management Stock Purchase Plan |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Compensation expense(1) | 93 | 124 | 104
Income tax benefit | 20 | 27 | 22
Fair value of grants vested | 129 | 87 | 70
Performance-based share units |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Compensation expense(1) | 332 | 457 | 637
Income tax benefit | 71 | 98 | 137
Fair value of grants vested | 594 | 548 | 435
DCRP |  |  |
Share Based Compensation Arrangement By Share Based Payment Award [Line Items] |  |  |
Compensation expense(1) | 188 | 169 | 135
Income tax benefit | 40 | 36 | 29
Fair value of grants vested | $ 171 | $ 174 | $ 118

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