Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Interest income:
Loans and leases: Taxable	$ 23,609	$ 22,710	$ 21,799
Loans and leases: Nontaxable	753	654	538
Interest-bearing deposits with financial institutions	67	26	26
Investment securities:
U.S. government agency and corporations	1,709	1,180	1,088
States and political subdivisions (nontaxable)	1,282	1,301	1,280
Other securities	75	143	112
Federal funds sold			1
Total interest income	27,495	26,014	24,844
Interest expense:
Deposits	2,309	2,236	2,036
Securities sold under repurchase agreements	20	18	21
Other short-term borrowings and other	29	20	8
Long-term debt		255	852
Total interest expense	2,358	2,529	2,917
Net interest income	25,137	23,485	21,927
Provision for loan losses	1,025	1,075	1,060
Net interest income after provision for loan losses	24,112	22,410	20,867
Other income:
Service charges on deposit accounts	2,139	1,756	1,837
Interchange fees	1,551	1,375	1,324
Fees from trust fiduciary activities	721	739	674
Fees from financial services	586	504	545
Service charges on loans	859	809	750
Fees and other revenue	783	764	682
Earnings on bank-owned life insurance	353	342	339
Gain (loss) on sale or disposal of:
Loans	1,009	1,191	645
Investment securities	9	80	599
Premises and equipment	(5)	(27)	(41)
Total other income	8,005	7,533	7,354
Other expenses:
Salaries and employee benefits	11,594	10,476	9,877
Premises and equipment	3,543	3,590	3,501
Advertising and marketing	1,223	1,482	1,279
Professional services	1,561	1,631	1,368
FDIC assessment	351	397	358
Loan collection	194	160	224
Other real estate owned	207	205	344
Office supplies and postage	472	434	461
Automated transaction processing	607	615	627
FHLB prepayment fee		570	457
Data processing and communication	981	582	402
PA shares tax	320	148	212
Other	602	732	593
Total other expenses	21,655	21,022	19,703
Income before income taxes	10,462	8,921	8,518
Provision for income taxes	2,769	1,818	2,166
Net income	$ 7,693	$ 7,103	$ 6,352
Per share data:
Net income - basic	$ 3.14	$ 2.91	$ 2.63
Net income - diluted	3.13	2.90	2.62
Dividends	$ 1.24	$ 1.16	$ 1.10