Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Interest and dividend income:
Interest and fees on loans		$ 54,557	$ 50,660	$ 108,007	$ 100,464
Interest and dividends on securities available for sale:
U. S. government sponsored enterprises		614	909	1,210	1,815
State and political subdivisions		0	1	0	1
Mortgage-backed securities and collateralized mortgage obligations - residential		1,613	1,451	3,096	2,945
Corporate bonds		210	362	470	838
Small Business Administration-guaranteed participation securities		75	94	156	194
Other securities		8	2	15	5
Total interest and dividends on securities available for sale		2,520	2,819	4,947	5,798
Interest on held to maturity securities:
Mortgage-backed securities and collateralized mortgage obligations-residential		54	65	111	133
Total interest on held to maturity securities		54	65	111	133
Federal Home Loan Bank stock		129	147	280	299
Interest on federal funds sold and other short-term investments		7,212	6,894	13,944	13,644
Total interest income		64,472	60,585	127,289	120,338
Interest on deposits:
Interest-bearing checking		536	288	1,094	528
Savings accounts		733	675	1,467	1,387
Money market deposit accounts		2,086	2,228	4,075	4,570
Time deposits		19,195	19,400	38,178	39,077
Interest on short-term borrowings		176	206	356	410
Total interest expense		22,726	22,797	45,170	45,972
Net interest income		41,746	37,788	82,119	74,366
Provision for credit losses		650	500	950	1,100
Net interest income after provision for credit losses		41,096	37,288	81,169	73,266
Noninterest income:
Trustco financial services income		1,818	1,609	3,938	3,425
Fees for services to customers		2,266	2,399	4,911	5,144
Net gains on equity securities	[1]	0	1,360	0	1,360
Other		768	283	977	565
Total noninterest income		4,852	5,651	9,826	10,494
Noninterest expenses:
Salaries and employee benefits		11,876	12,520	23,770	23,947
Net occupancy expense		4,518	4,375	9,072	8,986
Equipment expense		1,918	1,990	3,862	3,728
Professional services		1,886	1,570	3,612	3,030
Outsourced services		2,460	2,755	5,160	5,256
Advertising expense		304	466	665	874
FDIC and other insurance		1,136	797	2,324	1,891
Other real estate expense, net		522	16	550	90
Other		1,603	1,970	3,537	3,560
Total noninterest expenses		26,223	26,459	52,552	51,362
Income before taxes		19,725	16,480	38,443	32,398
Income taxes		4,686	3,929	9,129	7,721
Net income		$ 15,039	$ 12,551	$ 29,314	$ 24,677
Net income per share:
Basic (in dollars per share)		$ 0.79	$ 0.66	$ 1.54	$ 1.3
Diluted (in dollars per share)		$ 0.79	$ 0.66	$ 1.54	$ 1.3

[1] Not within the scope of ASC 606.