Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Interest and dividend income:
Interest and fees on loans	$ 35,605	$ 34,983
Interest and dividends on securities available for sale:
U. S. government sponsored enterprises	255	212
State and political subdivisions	14	25
Mortgage-backed securities and collateralized mortgage obligations-residential	2,116	2,393
Corporate bonds	0	1
Small Business Administration-guaranteed participation securities	476	522
Mortgage-backed securities and collateralized mortgage obligations-commercial	36	37
Other securities	4	4
Total interest and dividends on securities available for sale	2,901	3,194
Interest on held to maturity securities:
Mortgage-backed securities and collateralized mortgage obligations-residential	402	478
Corporate bonds	154	154
Total interest on held to maturity securities	556	632
Federal Reserve Bank and Federal Home Loan Bank stock	120	116
Interest on federal funds sold and other short-term investments	844	400
Total interest income	40,026	39,325
Interest on deposits:
Interest-bearing checking	114	105
Savings	604	658
Money market deposit accounts	496	617
Time deposits	2,373	2,434
Interest on short-term borrowings	257	346
Total interest expense	3,844	4,160
Net interest income	36,182	35,165
Provision for loan losses	800	800
Net interest income after provision for loan losses	35,382	34,365
Noninterest income:
Trustco financial services income	1,605	1,653
Fees for services to customers	2,661	2,524
Net gain on securities transactions	0	249
Other	306	197
Total noninterest income	4,572	4,623
Noninterest expenses:
Salaries and employee benefits	9,003	8,481
Net occupancy expense	4,088	4,108
Equipment expense	1,514	1,942
Professional services	2,146	1,507
Outsourced services	1,551	1,425
Advertising expense	729	600
FDIC and other insurance	1,990	1,065
Other real estate expense, net	519	424
Other	1,899	2,305
Total noninterest expenses	23,439	21,857
Income before taxes	16,515	17,131
Income taxes	6,106	6,416
Net income	$ 10,409	$ 10,715
Net income per share:
Basic (in dollars per share)	$ 0.109	$ 0.113
Diluted (in dollars per share)	$ 0.109	$ 0.113