Securities Available for Sale (Details Textual)		12 Months Ended
		Dec. 31, 2022 USD ($) Securities	Dec. 31, 2021 USD ($) Securities	Dec. 31, 2020 USD ($)
Schedule Of Available For Sale Securities [Line Items]
Tax provision related to net realized gain	[1]	$ (87,000)	$ 176,000	$ (90,000)
Pledged to secure public deposits and repurchase agreements and Pledge to qualify carrying amount of securities		$ 479,000,000	$ 491,000,000
Number of securities not more than 10% of stockholder equities | Securities		0	0
Number of securities | Securities		847
Number of securities on unrealized loss position | Securities		803
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		15,000,000.0	$ 14,700,000
Local and Regional Bank Holdings and Other Miscellaneous Equity Funds
Schedule Of Available For Sale Securities [Line Items]
Equity securities		196,000	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		$ 100,000	$ 102,000

[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.