Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Interest and dividend income:
Interest and fees on loans	$ 41,432	$ 38,956	$ 82,685	$ 77,047
Interest and dividends on securities available for sale:
U. S. government sponsored enterprises	821	787	1,604	1,537
State and political subdivisions	3	6	4	13
Mortgage-backed securities and collateralized mortgage obligations	2,152	1,670	3,707	3,475
Corporate bonds	272	150	480	283
Small Business Administration-guaranteed participation securities	289	333	586	685
Other securities	5	4	10	9
Total interest and dividends on securities available for sale	3,542	2,950	6,391	6,002
Interest on held to maturity securities:
Mortgage-backed securities and collateralized mortgage obligations-residential	209	244	426	504
Total interest on held to maturity securities	209	244	426	504
Federal Reserve Bank and Federal Home Loan Bank stock	199	198	284	275
Interest on federal funds sold and other short-term investments	3,282	2,467	6,291	4,484
Total interest income	48,664	44,815	96,077	88,312
Interest on deposits:
Interest-bearing checking	94	112	215	218
Savings accounts	367	420	744	839
Money market deposit accounts	1,119	452	1,945	891
Time deposits	7,512	3,439	13,488	6,299
Interest on short-term borrowings	381	283	762	641
Total interest expense	9,473	4,706	17,154	8,888
Net interest income	39,191	40,109	78,923	79,424
(Credit) Provision for loan losses	(341)	300	(41)	600
Net interest income after provision for loan losses	39,532	39,809	78,964	78,824
Noninterest income:
Trustco financial services income	1,683	1,596	3,416	3,411
Fees for services to customers	2,611	2,677	5,131	5,322
Other	620	222	1,004	441
Total noninterest income	4,914	4,495	9,551	9,174
Noninterest expenses:
Salaries and employee benefits	11,711	10,741	23,162	21,163
Net occupancy expense	4,006	4,101	8,173	8,416
Equipment expense	1,709	1,793	3,611	3,544
Professional services	1,568	1,814	3,218	3,244
Outsourced services	1,875	1,825	3,800	3,750
Advertising expense	778	670	1,563	1,300
FDIC and other insurance	598	514	1,246	1,537
Other real estate expense, net	210	294	186	666
Other	2,447	2,343	4,810	4,630
Total noninterest expenses	24,902	24,095	49,769	48,250
Income before taxes	19,544	20,209	38,746	39,748
Income taxes	4,877	4,804	9,521	9,535
Net income	$ 14,667	$ 15,405	$ 29,225	$ 30,213
Net income per share:
Basic (in dollars per share)	$ 0.152	$ 0.160	$ 0.302	$ 0.313
Diluted (in dollars per share)	$ 0.151	$ 0.160	$ 0.302	$ 0.313