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Securities Available for Sale (Details Textual) | 12 Months Ended
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Dec. 31, 2021 USD ($) Securities | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($)
Schedule Of Available For Sale Securities [Line Items] |  |  |  |
Tax provision related to net realized gain | [1] | $ 176,000 | $ (90,000) | $ (2,000)
Pledged to secure public deposits and repurchase agreements and Pledge to qualify carrying amount of securities |  | $ 491,000,000 | 371,000,000 |
Number of securities not more than 10% of stockholder equities | Securities |  | 0 |  |
Number of securities | Securities |  | 842 |  |
Number of securities on unrealized loss position | Securities |  | 207 |  |
Allowance for credit losses on available-for-sale securities |  | $ 0 |  |
Small Business Investment Company Partnership Investments |  |  |  |
Schedule Of Available For Sale Securities [Line Items] |  |  |  |
Equity securities |  | 14,700,000 |  |
Local and Regional Bank Holdings and Other Miscellaneous Equity Funds |  |  |  |
Schedule Of Available For Sale Securities [Line Items] |  |  |  |
Equity securities |  | 228,000 |  |
Farmers Trust Company |  |  |  |
Schedule Of Available For Sale Securities [Line Items] |  |  |  |
Pledged to secure public deposits and repurchase agreements and Pledge to qualify carrying amount of securities |  | $ 102,000 | $ 100,000 |
[1] | Pre-tax reclassification adjustments relating to available-for-sale securities are reported in security gains and the tax impact is included in income tax expense on the consolidated statements of income.

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- Definition Amount of allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 9 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922900-210455 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aaa) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27161-111563 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124258926&loc=SL82898722-210454 + Details
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