Consolidated Statements Of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Operating Activities
Net income	$ 44,025,000	$ 41,962,000
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization and (accretion), net	6,213,000	4,036,000
Recovery of credit losses	(756,000)	(2,440,000)
Depreciation of premises and equipment	2,716,000	2,906,000
Deferred income tax expense	634,000	1,889,000
Net periodic employee benefit cost	128,000	317,000
Pension contributions	0	(1,000,000)
Gains on sale of investment securities, net	(1,324,000)	670,000
Stock-compensation expense	1,658,000	1,778,000
Share-Based Payment Arrangement, Exercise of Option, Tax Benefit	91,000	221,000
Increase in value of bank-owned life insurance	(2,992,000)	(2,399,000)
Loans originated for sale	(23,467,000)	(17,723,000)
Proceeds from the sale of loans originated for sale	23,512,000	17,295,000
Gain on sale of loans	(224,000)	(154,000)
Change in accrued interest receivable	(715,000)	(174,000)
Change in other assets	(11,350,000)	(9,956,000)
Change in other liabilities	4,781,000	4,881,000
Net Cash Provided by Operating Activities	45,396,000	40,327,000
Investing Activities
Net (increase) decrease in loans	(22,554,000)	92,250,000
Purchases	362,820,000	316,479,000
Proceeds from maturities and calls	131,306,000	136,560,000
Purchases	(258,000)	(116,000)
Proceeds from sales	83,000	3,619,000
Purchases of premises and equipment	(1,050,000)	(2,561,000)
Proceeds from the disposals of premises and equipment	64,000	366,000
Proceeds from bank-owned life insurance policies	3,624,000	2,147,000
Payments for low income housing tax credits	(832,000)	(1,559,000)
Net Cash Used in Investing Activities	(252,437,000)	(85,773,000)
Financing Activities
Net increase in non-interest-bearing deposits	158,535,000	102,942,000
Net increase in interest-bearing deposits	58,098,000	49,485,000
Net increase in short-term borrowings	89,910,000	15,360,000
Purchases of treasury stock	(19,295,000)	(22,843,000)
Proceeds from exercise of stock options	661,000	537,000
Repayments of Debt and Lease Obligation	(382,000)	(431,000)
Dividends paid	(18,138,000)	(18,373,000)
Net Cash Provided by Financing Activities	269,389,000	126,677,000
Increase in Cash and Cash Equivalents	62,348,000	81,231,000
Cash and cash equivalents at beginning of period	634,631,000	528,659,000
Cash and Cash Equivalents at End of Period	696,979,000	609,890,000
Supplemental Cash Flow Information:
Cash paid for interest	3,257,000	6,851,000
Cash paid for income taxes	$ 10,828,000	$ 10,650,000