Consolidated Statements of Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Interest income:
Loans and leases: Taxable	$ 41,985	$ 32,364	$ 29,155
Loans and leases: Nontaxable	1,256	1,077	958
Interest-bearing deposits with financial institutions	121	47	104
Restricted investments in bank stock	162	417	194
Investment securities:
U.S. government agency and corporations	3,197	3,633	3,314
States and political subdivisions (nontaxable)	2,374	1,731	1,594
States and political subdivisions (taxable)	398
Other securities	3		11
Total interest income	49,496	39,269	35,330
Interest expense:
Deposits	4,756	6,176	3,811
Securities sold under repurchase agreements			16
Other short-term borrowings and other	248	878	667
FHLB advances	307	500	379
Total interest expense	5,311	7,554	4,873
Net interest income	44,185	31,715	30,457
Provision for loan losses	5,250	1,085	1,450
Net interest income after provision for loan losses	38,935	30,630	29,007
Other income:
Earnings on bank-owned life insurance	794	647	598
Gain (loss) on write-down, sale or disposal of:
Loans	3,603	856	645
Available-for-sale debt securities	115	14	10
Equity securities			44
Premises and equipment	(142)	(13)	(18)
Total other income	14,668	10,193	9,200
Other expenses:
Salaries and employee benefits	19,831	14,761	13,678
Premises and equipment	5,623	4,124	3,775
Data processing and communication	2,246	1,765	1,470
Advertising and marketing	2,269	1,610	1,656
Professional services	2,869	1,362	1,606
Merger-related expenses	2,452	440
Automated transaction processing	1,158	877	784
Office supplies and postage	541	413	399
PA shares tax	381	303	242
Loan collection	131	264	132
Other real estate owned	28	121	177
FDIC assessment	280	133	267
FHLB prepayment fee	481
Other	29	748	886
Total other expenses	38,319	26,921	25,072
Income before income taxes	15,284	13,902	13,135
Provision for income taxes	2,249	2,326	2,129
Net income	$ 13,035	$ 11,576	$ 11,006
Per share data:
Net income - basic	$ 2.84	$ 3.06	$ 2.93
Net income - diluted	2.82	3.03	2.90
Dividends	$ 1.14	$ 1.06	$ 0.98
Service charges on deposit accounts [Member]
Other income:
Other income: revenues from contracts with customers	$ 2,117	$ 2,286	$ 2,244
Interchange fees [Member]
Other income:
Other income: revenues from contracts with customers	3,153	2,208	2,051
Service charges on loans [Member]
Other income:
Other income: revenues from contracts with customers	1,681	1,054	579
Fees from trust fiduciary activities [Member]
Other income:
Other income: revenues from contracts with customers	1,785	1,350	1,319
Fees from financial services [Member]
Other income:
Other income: revenues from contracts with customers	749	946	759
Fees and other revenue [Member]
Other income:
Other income: revenues from contracts with customers	$ 813	$ 845	$ 969