Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2021	Mar. 31, 2020
Interest and dividend income:
Interest and fees on loans		$ 40,217	$ 42,063
Interest and dividends on securities available for sale:
U. S. government sponsored enterprises		50	421
State and political subdivisions		1	1
Mortgage-backed securities and collateralized mortgage obligations - residential		1,237	2,113
Corporate bonds		316	238
Small Business Administration-guaranteed participation securities		206	245
Other securities		6	6
Total interest and dividends on securities available for sale		1,816	3,024
Interest on held to maturity securities:
Mortgage-backed securities and collateralized mortgage obligations-residential		123	175
Total interest on held to maturity securities		123	175
Federal Reserve Bank and Federal Home Loan Bank stock		69	82
Interest on federal funds sold and other short-term investments		270	1,267
Total interest income		42,495	46,611
Interest on deposits:
Interest-bearing checking		52	16
Savings accounts		159	233
Money market deposit accounts		283	1,096
Time deposits		1,666	6,391
Interest on short-term borrowings		228	322
Total interest expense		2,388	8,058
Net interest income		40,107	38,553
Provision for loan losses		350	2,000
Net interest income after provision for loan losses		39,757	36,553
Noninterest income:
Trustco financial services income		2,035	1,600
Fees for services to customers		2,204	2,315
Net gain on securities transactions	[1]	0	1,155
Other		189	264
Total noninterest income		4,428	5,334
Noninterest expenses:
Salaries and employee benefits		12,425	11,373
Net occupancy expense		4,586	4,306
Equipment expense		1,631	1,802
Professional services		1,432	1,481
Outsourced services		2,250	2,075
Advertising expense		354	488
FDIC and other insurance		707	294
Other real estate expense, net		239	194
Other		1,711	2,255
Total noninterest expenses		25,335	24,268
Income before taxes		18,850	17,619
Income taxes		4,767	4,306
Net income		$ 14,083	$ 13,313
Net income per share:
Basic (in dollars per share)		$ 0.146	$ 0.138
Diluted (in dollars per share)		$ 0.146	$ 0.138

[1] Not within the scope of ASC 606.