Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash Flows from Operating Activities:
Net Income	$ 49,857	$ 40,827	$ 37,475
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Provision for Credit Losses	272	9,319	2,079
Depreciation and Amortization	7,826	6,867	5,503
Allocation of ESOP Stock	0	0	180
Loss on the Sale of Securities Available-for-Sale	0	37	0
Net (Gain) Loss on Equity Securities	(111)	427	(289)
Loans Originated and Held-for-Sale	(48,720)	(94,773)	(23,850)
Proceeds from the Sale of Loans Held-for-Sale	61,044	87,729	24,538
Net Gains on the Sale of Loans	(2,393)	(3,889)	(622)
Net Gains (Losses) on the Sale or Write-down of Premises and Equipment,     Other Real Estate Owned and Repossessed Assets	277	(161)	882
Contributions to Pension & Postretirement Plans	(622)	(673)	(675)
Deferred Income Tax Expense (Benefit)	945	(2,240)	344
Shares Issued Under the Directors’ Stock Plan	376	125	258
Stock-Based Compensation Expense	414	420	391
Tax Benefit from Exercise of Stock Options	69	52	227
Net Increase in Other Assets	(5,065)	(2,339)	(12,527)
Net Increase in Other Liabilities	4,037	586	10,030
Net Cash Provided By Operating Activities	68,206	42,314	43,944
Cash Flows from Investing Activities:
Proceeds from the Sale of Securities Available-for-Sale	0	65,273	0
Proceeds from the Maturities and Calls of Securities Available-for-Sale	118,330	104,941	96,058
Purchases of Securities Available-for-Sale	(323,372)	(173,234)	(131,348)
Proceeds from the Maturities and Calls of Securities Held-to-Maturity	30,561	33,896	41,607
Purchases of Securities Held-to-Maturity	(9,377)	(7,953)	(4,003)
Net Increase in Loans	(85,123)	(200,554)	(193,460)
Proceeds from the Sales of Premises and Equipment, Other    Real Estate Owned and Repossessed Assets	1,547	2,478	1,511
Purchase of Premises and Equipment	(7,137)	(5,132)	(7,785)
Net (Increase) Decrease in Federal Home Loan Bank Stock	(31)	4,968	5,189
Purchase of Bank Owned Life Insurance	0	(12,000)	0
Net Cash Used In Investing Activities	(274,602)	(187,317)	(192,231)
Cash Flows from Financing Activities:
Net Increase in Deposits	315,771	618,672	270,470
Net Decrease in Short-Term Federal Home Loan Bank Borrowings	0	(130,000)	(104,000)
Net Decrease in Short-Term Borrowings	(17,486)	(33,613)	(3,560)
Federal Home Loan Bank Advances	0	45,000	0
Finance Lease Payments	(48)	(37)	(28)
Repayments of Federal Home Loan Bank Advances	0	(30,000)	(15,000)
Purchase of Treasury Stock	(2,662)	(1,578)	(2,469)
Shares Issued for Stock Option Exercises, net	1,505	748	1,792
Shares Issued Under the Employee Stock Purchase Plan	481	513	493
Shares Issued for Dividend Reinvestment Plans	1,836	1,808	1,777
Cash Dividends Paid	(16,296)	(15,740)	(15,206)
Net Cash Provided By Financing Activities	283,101	455,773	134,269
Net Increase (Decrease) in Cash and Cash Equivalents	76,705	310,770	(14,018)
Cash and Cash Equivalents at Beginning of Year	380,991	70,221	84,239
Cash and Cash Equivalents at End of Year	457,696	380,991	70,221
Supplemental Disclosures to Statements of Cash Flow Information:
Interest on Deposits and Borrowings	5,373	13,799	20,843
Income Taxes	14,760	10,969	9,931
Non-cash Investing and Financing Activity:
Transfer of Loans to Other Real Estate Owned and Repossessed Assets	$ 1,358	$ 1,000	$ 1,810