Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Interest and dividend income:
Interest and fees on loans	$ 40,073	$ 37,513	$ 117,120	$ 110,219
Interest and dividends on securities available for sale:
U. S. government sponsored enterprises	787	465	2,324	1,667
State and political subdivisions	7	6	20	29
Mortgage-backed securities and collateralized mortgage obligations-residential	1,601	1,815	5,039	5,717
Corporate bonds	202	153	485	458
Small Business Administration-guaranteed participation securities	325	380	1,010	1,189
Mortgage-backed securities and collateralized mortgage obligations-commercial	0	22	37	66
Other securities	4	4	13	12
Total interest and dividends on securities available for sale	2,926	2,845	8,928	9,138
Interest on held to maturity securities:
Mortgage-backed securities and collateralized mortgage obligations-residential	232	276	736	888
Corporate bonds	0	102	0	410
Total interest on held to maturity securities	232	378	736	1,298
Federal Reserve Bank and Federal Home Loan Bank stock	82	125	357	393
Interest on federal funds sold and other short-term investments	2,425	1,927	6,909	4,900
Total interest income	45,738	42,788	134,050	125,948
Interest on deposits:
Interest-bearing checking	113	113	331	371
Savings	417	435	1,256	1,300
Money market deposit accounts	544	469	1,435	1,403
Time deposits	3,864	2,247	10,163	6,711
Interest on short-term borrowings	277	345	918	1,043
Total interest expense	5,215	3,609	14,103	10,828
Net interest income	40,523	39,179	119,947	115,120
Provision for loan losses	300	550	900	1,700
Net interest income after provision for loan losses	40,223	38,629	119,047	113,420
Noninterest income:
Trustco financial services income	1,516	1,844	4,927	5,127
Fees for services to customers	2,693	2,767	8,015	8,201
Other	246	243	687	757
Total noninterest income	4,455	4,854	13,629	14,085
Noninterest expenses:
Salaries and employee benefits	10,761	10,360	31,924	30,129
Net occupancy expense	3,997	4,027	12,413	12,403
Equipment expense	1,783	1,669	5,327	4,653
Professional services	1,578	1,679	4,822	5,570
Outsourced services	1,875	1,650	5,625	4,650
Advertising expense	844	699	2,144	2,019
FDIC and other insurance	682	1,018	2,219	3,077
Other real estate expense (income), net	528	275	1,194	770
Other	2,496	2,149	7,126	7,187
Total noninterest expenses	24,544	23,526	72,794	70,458
Income before taxes	20,134	19,957	59,882	57,047
Income taxes	4,935	7,361	14,470	21,264
Net income	$ 15,199	$ 12,596	$ 45,412	$ 35,783
Net income per share:
Basic (in dollars per share)	$ 0.157	$ 0.131	$ 0.471	$ 0.373
Diluted (in dollars per share)	$ 0.157	$ 0.131	$ 0.470	$ 0.372