Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net income	$ 17,089	$ 14,083
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	1,024	1,063
Amortization of right-of-use asset	1,608	1,573
Net gain on sale of other real estate owned	(73)	0
Writedown of other real estate owned	0	121
(Credit) provision for credit losses	(200)	350
Deferred tax expense	744	1,152
Net amortization of securities	697	1,081
Net gain on sale of bank premises and equipment	(314)	(4)
Decrease in taxes receivable	489	101
Decrease in interest receivable	202	392
Decrease in interest payable	(32)	(164)
Increase in other assets	(2,601)	(3,160)
Decrease in operating lease liabilities	(1,713)	(1,637)
Decrease in accrued expenses and other liabilities	(5,943)	(6,221)
Total adjustments	(6,112)	(5,353)
Net cash provided by operating activities	10,977	8,730
Cash flows from investing activities:
Proceeds from sales, paydowns and calls of securities available for sale	17,923	36,820
Proceeds from paydowns of held to maturity securities	716	1,061
Purchases of securities available for sale	(34,097)	(132,456)
Proceeds from maturities of securities available for sale	5,000	55
Net increase in loans	(25,516)	(24,656)
Proceeds from dispositions of other real estate owned	166	0
Proceeds from dispositions of bank premises and equipment	469	4
Purchases of bank premises and equipment	(796)	(663)
Net cash used in investing activities	(36,135)	(119,835)
Cash flows from financing activities:
Net increase in deposits	81,887	135,729
Net increase in short-term borrowings	3,685	15,195
Proceeds from exercise of stock options	0	71
Purchases of treasury stock	(609)	(45)
Dividends paid	(6,727)	(6,571)
Net cash provided by financing activities	78,236	144,379
Net increase in cash and cash equivalents	53,078	33,274
Cash and cash equivalents at beginning of period	1,219,470	1,107,099
Cash and cash equivalents at end of period	1,272,548	1,140,373
Cash paid during the year for:
Interest paid	1,226	2,552
Income taxes paid	5,090	4,661
Other non cash items:
Change in unrealized (loss) gain on securities available for sale-gross of deferred taxes	(19,225)	(6,018)
Change in deferred tax effect on unrealized loss (gain) on securities available for sale	4,974	1,557
Amortization of net actuarial gain and prior service cost (credit) on pension and postretirement plans	(358)	(280)
Change in deferred tax effect of amortization of net actuarial gain postretirement benefit plans	93	73
Security purchase settled in subsequent period	(10,000)	0
Impact to retained earnings from adoption of ASC 326, net of tax	$ (3,470)	$ 0