Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Interest and dividend income:
Interest and fees on loans		$ 55,953	$ 52,112	$ 163,960	$ 152,576
Interest and dividends on securities available for sale:
U. S. government sponsored enterprises		599	718	1,809	2,533
State and political subdivisions		1	0	1	1
Mortgage-backed securities and collateralized mortgage obligations - residential		1,583	1,397	4,679	4,342
Corporate bonds		265	361	735	1,199
Small Business Administration-guaranteed participation securities		72	90	228	284
Other securities		7	2	22	7
Total interest and dividends on securities available for sale		2,527	2,568	7,474	8,366
Interest on held to maturity securities:
Mortgage-backed securities and collateralized mortgage obligations-residential		52	62	163	195
Total interest on held to maturity securities		52	62	163	195
Federal Home Loan Bank stock		125	153	405	452
Interest on federal funds sold and other short-term investments		7,376	6,174	21,320	19,818
Total interest income		66,033	61,069	193,322	181,407
Interest on deposits:
Interest-bearing checking		483	311	1,577	839
Savings accounts		741	770	2,208	2,157
Money market deposit accounts		2,065	2,154	6,140	6,724
Time deposits		19,427	18,969	57,605	58,046
Interest on short-term borrowings		198	194	554	604
Total interest expense		22,914	22,398	68,084	68,370
Net interest income		43,119	38,671	125,238	113,037
Provision for credit losses		250	500	1,200	1,600
Net interest income after provision for credit losses		42,869	38,171	124,038	111,437
Noninterest income:
Trustco financial services income		1,967	2,044	5,905	5,469
Fees for services to customers		2,429	2,482	7,340	7,626
Net gains on equity securities	[1]	0	23	0	1,383
Other		293	382	1,270	947
Total noninterest income		4,689	4,931	14,515	15,425
Noninterest expenses:
Salaries and employee benefits		12,727	12,134	36,497	36,081
Net occupancy expense		4,470	4,271	13,542	13,257
Equipment expense		1,938	1,757	5,800	5,485
Professional services		1,571	1,863	5,183	4,893
Outsourced services		2,492	2,551	7,652	7,807
Advertising expense		290	339	955	1,213
FDIC and other insurance		1,052	1,112	3,376	3,003
Other real estate expense, net		8	204	558	294
Other		1,694	1,969	5,231	5,529
Total noninterest expenses		26,242	26,200	78,794	77,562
Income before taxes		21,316	16,902	59,759	49,300
Income taxes		5,058	4,027	14,187	11,748
Net income		$ 16,258	$ 12,875	$ 45,572	$ 37,552
Net income per share:
- Basic (in Dollars per share)		$ 0.87	$ 0.68	$ 2.41	$ 1.97
- Diluted (in Dollars per share)		$ 0.86	$ 0.68	$ 2.41	$ 1.97

[1] Not within the scope of ASC 606.