Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Interest and dividend income:
Interest and fees on loans	$ 36,171	$ 35,631	$ 107,428	$ 105,957
Interest and dividends on securities available for sale:
U. S. government sponsored enterprises	408	584	1,067	1,162
State and political subdivisions	13	23	40	71
Mortgage-backed securities and collateralized mortgage obligations-residential	1,829	2,230	6,114	6,899
Corporate bonds	97	0	97	1
Small Business Administration-guaranteed participation securities	445	497	1,371	1,522
Mortgage-backed securities and collateralized mortgage obligations-commercial	36	37	110	112
Other securities	4	4	12	12
Total interest and dividends on securities available for sale	2,832	3,375	8,811	9,779
Interest on held to maturity securities:
Mortgage-backed securities and collateralized mortgage obligations-residential	347	461	1,123	1,419
Corporate bonds	156	153	464	461
Total interest on held to maturity securities	503	614	1,587	1,880
Federal Reserve Bank and Federal Home Loan Bank stock	131	113	369	347
Interest on federal funds sold and other short-term investments	866	408	2,542	1,231
Total interest income	40,503	40,141	120,737	119,194
Interest on deposits:
Interest-bearing checking	120	117	350	333
Savings	504	603	1,712	1,860
Money market deposit accounts	463	537	1,426	1,701
Time deposits	2,468	2,544	7,301	7,478
Interest on short-term borrowings	281	290	800	936
Total interest expense	3,836	4,091	11,589	12,308
Net interest income	36,667	36,050	109,148	106,886
Provision for loan losses	750	800	2,350	2,400
Net interest income after provision for loan losses	35,917	35,250	106,798	104,486
Noninterest income:
Trustco financial services income	1,347	1,351	4,464	4,482
Fees for services to customers	2,664	2,770	8,062	7,985
Net gain on securities transactions	0	0	668	249
Other	718	244	1,306	726
Total noninterest income	4,729	4,365	14,500	13,442
Noninterest expenses:
Salaries and employee benefits	8,995	7,834	26,932	24,479
Net occupancy expense	3,887	3,929	11,893	11,915
Equipment expense	1,596	1,596	4,950	5,341
Professional services	1,959	2,238	6,203	5,811
Outsourced services	1,465	1,425	4,441	4,275
Advertising expense	489	668	1,788	2,001
FDIC and other insurance	1,127	2,202	5,066	4,284
Other real estate expense, net	895	806	1,837	1,431
Other	2,636	2,766	7,352	7,915
Total noninterest expenses	23,049	23,464	70,462	67,452
Income before taxes	17,597	16,151	50,836	50,476
Income taxes	6,667	5,535	19,033	18,418
Net income	$ 10,930	$ 10,616	$ 31,803	$ 32,058
Net income per share:
Basic (in dollars per share)	$ 0.114	$ 0.112	$ 0.333	$ 0.337
Diluted (in dollars per share)	$ 0.114	$ 0.111	$ 0.333	$ 0.337