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Stock-Based Compensation - Narrative (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Options exercisable (in shares) | 107,553 | 136,038 | 112,319
Options exercisable, weighted average exercise price (in USD per share) | $ 32.63 | $ 29.42 | $ 28.17
Total intrinsic value of stock options outstanding | $ 1,200,000 | $ 682,000 | $ 1,100,000
Total intrinsic value of stock options exercisable | 1,200,000 | 682,000 | 1,100,000
Total intrinsic value of stock options exercised | 969,000 | 0 | 203,000
Stock-based compensation expense | $ 1,073,000 | 943,000 | 832,000
Stock Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Share based compensation options contractual term | 10 years |  |
Stock incentive plan vesting period, years | 3 years |  |
Amount withheld for stock option exercises and related income taxes | $ 1,700,000 | 0 | 317,000
Stock-based compensation expense | 173,000 | 148,000 | 143,000
Unrecognized compensation expense | $ 218,000 |  |
Weighted-average period for recognition of expense | 2 years 3 months 18 days |  |
Cash Stock Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Proceeds from exercise of stock options | $ 0 | 0 | 0
Cashless Stock Options |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Proceeds from exercise of stock options | $ 1,400,000 | 0 | 282,000
Restricted Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock incentive plan vesting period, years | 3 years |  |
Stock-based compensation expense | $ 900,000 | 795,000 | 689,000
Unrecognized compensation expense | $ 1,300,000 |  |
Weighted-average period for recognition of expense | 2 years 3 months 18 days |  |
Intrinsic value of restricted stock units vested | $ 1,300,000 | $ 735,000 | $ 906,000
Prior Stock Option Plans |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares of authorized stock for stock incentive plan (in shares) | 0 |  |
2020 Stock Option Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares of authorized stock for stock incentive plan (in shares) | 325,000 |  |

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- Definition Amount of cost not yet recognized for nonvested award under share-based payment arrangement. + 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 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + 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 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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