Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Interest and dividend income:
Interest and fees on loans	$ 35,343	$ 33,614	$ 70,326	$ 66,488
Interest and dividends on securities available for sale:
U. S. government sponsored enterprises	366	381	578	887
State and political subdivisions	23	44	48	112
Mortgage-backed securities and collateralized mortgage obligations-residential	2,276	3,299	4,669	6,377
Corporate bonds	0	2	1	61
Small Business Administration-guaranteed participation securities	503	539	1,025	1,095
Mortgage-backed securities and collateralized mortgage obligations-commercial	38	38	75	76
Other securities	4	4	8	8
Total interest and dividends on securities available for sale	3,210	4,307	6,404	8,616
Interest on held to maturity securities:
Mortgage-backed securities and collateralized mortgage obligations-residential	480	577	958	1,202
Corporate bonds	154	154	308	308
Total interest on held to maturity securities	634	731	1,266	1,510
Federal Reserve Bank and Federal Home Loan Bank stock	118	128	234	261
Interest on federal funds sold and other short-term investments	423	376	823	727
Total interest income	39,728	39,156	79,053	77,602
Interest on deposits:
Interest-bearing checking	111	89	216	173
Savings	599	592	1,257	1,355
Money market deposit accounts	547	618	1,164	1,217
Time deposits	2,500	2,035	4,934	3,986
Interest on short-term borrowings	300	342	646	735
Total interest expense	4,057	3,676	8,217	7,466
Net interest income	35,671	35,480	70,836	70,136
Provision for loan losses	800	1,500	1,600	3,000
Net interest income after provision for loan losses	34,871	33,980	69,236	67,136
Noninterest income:
Trustco financial services income	1,478	1,405	3,131	2,915
Fees for services to customers	2,691	2,732	5,215	5,253
Net gain on securities transactions	0	0	249	6
Other	285	368	482	2,090
Total noninterest income	4,454	4,505	9,077	10,264
Noninterest expenses:
Salaries and employee benefits	8,164	8,012	16,645	15,604
Net occupancy expense	3,878	4,110	7,986	8,369
Equipment expense	1,803	1,823	3,745	3,575
Professional services	2,066	1,438	3,573	2,724
Outsourced services	1,425	1,425	2,850	2,750
Advertising expense	733	657	1,333	1,256
FDIC and other insurance	1,017	1,000	2,082	1,904
Other real estate expense (income), net	201	(1,688)	625	(833)
Other	2,844	2,660	5,149	4,889
Total noninterest expenses	22,131	19,437	43,988	40,238
Income before taxes	17,194	19,048	34,325	37,162
Income taxes	6,467	7,240	12,883	14,343
Net income	$ 10,727	$ 11,808	$ 21,442	$ 22,819
Net income per share:
Basic (in dollars per share)	$ 0.113	$ 0.125	$ 0.226	$ 0.241
Diluted (in dollars per share)	$ 0.113	$ 0.125	$ 0.225	$ 0.241