Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities:
Net income		$ 14,083	$ 13,313
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation		1,063	999
Amortization of right-of-use asset		1,573	1,520
Net gain on sale of other real estate owned		0	(82)
Writedown of other real estate owned		121	80
Provision for loan losses		350	2,000
Deferred tax expense		1,152	846
Net amortization of securities		1,081	858
Stock based compensation expense		0	4
Net gain on sale of bank premises and equipment		(4)	0
Net gain on sales of securities	[1]	0	(1,155)
Decrease in taxes receivable		101	3,682
Decrease in interest receivable		392	673
Decrease in interest payable		(164)	(200)
Increase in other assets		(3,160)	(2,171)
Decrease in operating lease liabilities		(1,637)	(1,555)
Decrease in accrued expenses and other liabilities		(6,221)	(4,307)
Total adjustments		(5,353)	1,192
Net cash provided by operating activities		8,730	14,505
Cash flows from investing activities:
Proceeds from sales and calls of securities available for sale		36,820	98,363
Proceeds from calls and maturities of held to maturity securities		1,061	859
Purchases of securities available for sale		(132,456)	(22,793)
Proceeds from maturities of securities available for sale		55	5,000
Net increase in loans		(24,656)	(37,792)
Proceeds from dispositions of other real estate owned		0	731
Proceeds from dispositions of bank premises and equipment		4	0
Purchases of bank premises and equipment		(663)	(805)
Net cash (used in) provided by investing activities		(119,835)	43,563
Cash flows from financing activities:
Net increase in deposits		135,729	31,812
Net increase (decrease) in short-term borrowings		15,195	(576)
Proceeds from exercise of stock options		71	0
Purchases of treasury stock		(45)	(3,493)
Dividends paid		(6,571)	(6,604)
Net cash provided by financing activities		144,379	21,139
Net increase in cash and cash equivalents		33,274	79,207
Cash and cash equivalents at beginning of period		1,107,099	456,846
Cash and cash equivalents at end of period		1,140,373	536,053
Cash paid during the year for:
Interest paid		2,552	8,258
Income taxes paid		4,661	626
Other non cash items:
Transfer of loans to other real estate owned		0	434
Increase in dividends payable		0	223
Change in unrealized (loss) gain on securities available for sale-gross of deferred taxes		(6,018)	9,577
Change in deferred tax effect on unrealized loss (gain) on securities available for sale		1,557	(2,487)
Amortization of net actuarial gain and prior service credit on pension and postretirement plans		(280)	(215)
Change in deferred tax effect of amortization of net actuarial gain postretirement benefit plans		$ 73	$ 56

[1] Not within the scope of ASC 606.