Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Operating Activities
Net income	$ 41,962	$ 47,249
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization and (accretion), net	4,036	873
(Recovery of) provision for credit losses	(2,440)	9,222
Depreciation of premises and equipment	2,906	2,772
Deferred income tax expense	1,889	2,323
Net periodic employee benefit cost	317	362
Pension contributions	(1,000)	(450)
Unrealized and realized investment securities (gains) losses, net	(670)	2,103
Gain from the sale of VISA shares	0	(17,837)
Stock-compensation expense	1,778	1,702
Excess tax benefit from stock-compensation expense	(221)	(137)
Increase in value of bank-owned life insurance	(2,399)	(2,523)
Loans originated for sale	(17,723)	(9,372)
Proceeds from the sale of loans originated for sale	17,295	9,854
Gain on sale of loans	(154)	(177)
Change in accrued interest receivable	(174)	(2,631)
Change in other assets	(9,956)	(9,515)
Change in other liabilities	4,881	16,334
Net Cash Provided by Operating Activities	40,327	50,152
Investing Activities
Net decrease (increase) in loans	92,250	(46,146)
Purchases	(316,479)	(232,478)
Proceeds from sales	0	28,548
Proceeds from maturities and calls	136,560	51,246
Other investments: Purchases	(116)	(2,132)
Other investments: Proceeds from sales	3,619	2,282
Proceeds from the sale of VISA shares	0	17,837
Purchases of premises and equipment	(2,561)	(3,798)
Proceeds from the disposals of premises and equipment	366	134
Proceeds from the disposition of assets held-for-sale	0	440
Proceeds from bank-owned life insurance policies	2,147	1,513
Payments for low income housing tax credits	(1,559)	(716)
Net Cash Used in Investing Activities	(85,773)	(183,270)
Financing Activities
Net increase in non-interest-bearing deposits	102,942	274,382
Net increase in interest-bearing deposits	49,485	61,150
Net increase in short-term borrowings	15,360	71,421
Repayment of long-term debt	0	(4,124)
Purchases of treasury stock	(22,843)	(17,864)
Proceeds from exercise of stock options	537	189
Repayments of Debt and Lease Obligation	(431)	(434)
Dividends paid	(18,373)	(18,492)
Net Cash Provided by Financing Activities	126,677	366,228
Increase in Cash and Cash Equivalents	81,231	233,110
Cash and cash equivalents at beginning of period	528,659	140,144
Cash and Cash Equivalents at End of Period	609,890	373,254
Supplemental Cash Flow Information:
Cash paid for interest	6,851	14,878
Cash paid for income taxes	$ 10,650	$ 2,400