Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Interest and dividend income:
Interest and fees on loans		$ 52,112	$ 47,921	$ 152,576	$ 138,255
Interest and dividends on securities available for sale:
U. S. government sponsored enterprises		718	672	2,533	2,055
State and political subdivisions		0	0	1	1
Mortgage-backed securities and collateralized mortgage obligations - residential		1,397	1,485	4,342	4,613
Corporate bonds		361	473	1,199	1,510
Small Business Administration-guaranteed participation securities		90	107	284	335
Other securities		2	2	7	7
Total interest and dividends on securities available for sale		2,568	2,739	8,366	8,521
Interest on held to maturity securities:
Mortgage-backed securities and collateralized mortgage obligations-residential		62	73	195	226
Total interest on held to maturity securities		62	73	195	226
Federal Home Loan Bank stock		153	131	452	351
Interest on federal funds sold and other short-term investments		6,174	6,688	19,818	20,213
Total interest income		61,069	57,552	181,407	167,566
Interest on deposits:
Interest-bearing checking		311	102	839	217
Savings accounts		770	639	2,157	1,824
Money market deposit accounts		2,154	2,384	6,724	4,954
Time deposits		18,969	11,962	58,046	26,525
Interest on short-term borrowings		194	244	604	808
Total interest expense		22,398	15,331	68,370	34,328
Net interest income		38,671	42,221	113,037	133,238
Provision (Credit) for credit losses		500	100	1,600	(100)
Net interest income after provision (credit) for credit losses		38,171	42,121	111,437	133,338
Noninterest income:
Trustco financial services income		2,044	1,627	5,469	4,813
Fees for services to customers		2,482	2,590	7,626	8,085
Net gains on equity securities	[1]	23	0	1,383	0
Other		382	357	947	943
Total noninterest income		4,931	4,574	15,425	13,841
Noninterest expenses:
Salaries and employee benefits		12,134	12,393	36,081	38,798
Net occupancy expense		4,271	4,358	13,257	13,218
Equipment expense		1,757	1,923	5,485	5,758
Professional services		1,863	1,717	4,893	4,684
Outsourced services		2,551	2,720	7,807	7,507
Advertising expense		339	586	1,213	1,494
FDIC and other insurance		1,112	1,078	3,003	3,215
Other real estate expense, net		204	163	294	536
Other		1,969	2,522	5,529	7,256
Total noninterest expenses		26,200	27,460	77,562	82,466
Income before taxes		16,902	19,235	49,300	64,713
Income taxes		4,027	4,555	11,748	15,915
Net income		$ 12,875	$ 14,680	$ 37,552	$ 48,798
Net income per share:
Basic (in dollars per share)		$ 0.68	$ 0.77	$ 1.97	$ 2.57
Diluted (in dollars per share)		$ 0.68	$ 0.77	$ 1.97	$ 2.57

[1] Not within the scope of ASC 606.