CONSOLIDATED STATEMENT OF INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
INTEREST AND DIVIDEND INCOME:
Loans, including fees	$ 45,833	$ 42,056	$ 39,134
Investment securities:
Taxable	2,182	2,424	3,426
Tax-exempt	1,218	1,498	2,795
Dividend and other interest income	744	835	769
TOTAL INTEREST AND DIVIDEND INCOME	49,977	46,813	46,124
INTEREST EXPENSE:
Deposits	4,083	3,547	3,129
Short-term borrowings	234	46	116
Long-term borrowings	1,580	1,974	1,974
TOTAL INTEREST EXPENSE	5,897	5,567	5,219
NET INTEREST INCOME	44,080	41,246	40,905
PROVISION FOR LOAN LOSSES	730	1,196	2,300
NET INTEREST INCOME AFTER PROVISION FOR LOAN LOSSES	43,350	40,050	38,605
NON-INTEREST INCOME:
Service charges	2,222	2,249	2,383
Securities gains, available for sale	600	1,611	2,592
Securities (losses) gains, trading	(8)	58	(22)
Bank-owned life insurance	666	684	720
Gain on sale of loans	1,674	2,102	1,743
Insurance commissions	496	795	781
Brokerage commissions	1,378	1,098	1,064
Debit card income	1,960	1,896	1,692
Other	1,756	1,620	1,812
TOTAL NON-INTEREST INCOME	10,744	12,113	12,765
NON-INTEREST EXPENSE:
Salaries and employee benefits	18,999	17,813	17,023
Occupancy	2,447	2,223	2,248
Furniture and equipment	2,915	2,793	2,622
Software amortization	974	1,256	1,140
Pennsylvania shares tax	925	873	954
Professional Fees	2,353	2,096	1,919
Federal Deposit Insurance Corporation deposit insurance	669	767	867
Debit card expenses	602	604	576
Marketing	958	740	612
Intangible amortization	337	366	311
Other	5,683	5,560	5,464
TOTAL NON-INTEREST EXPENSE	36,862	35,091	33,736
INCOME BEFORE INCOME TAX PROVISION	17,232	17,072	17,634
INCOME TAX PROVISION	7,459	4,597	3,736
NET INCOME	$ 9,773	$ 12,475	$ 13,898
EARNINGS PER SHARE - BASIC AND DILUTED (in dollars per share)	$ 2.08	$ 2.64	$ 2.91
WEIGHTED AVERAGE SHARES OUTSTANDING - BASIC AND DILUTED (in shares)	4,705,602	4,735,457	4,772,239
DIVIDENDS PER SHARE (in dollars per share)	$ 1.88	$ 1.88	$ 1.88