Condensed Consolidated Statements of Income (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Interest income
Loans, including fees	$ 35,789,000	$ 32,315,000
Securities, taxable	1,880,000	1,602,000
Securities, tax-exempt	561,000	594,000
Other interest-earning assets	407,000	470,000
Total interest income	38,637,000	34,981,000
Interest expense
Deposits	4,804,000	3,085,000
Short-term borrowings	104,000	57,000
Federal Home Loan Bank advances	2,234,000	945,000
Subordinated debentures and other borrowings	850,000	695,000
Total interest expense	7,992,000	4,782,000
Net interest income	30,645,000	30,199,000
Provision for loan losses	850,000	0
Net interest income after provision for loan losses	29,795,000	30,199,000
Noninterest income:
Payroll services	505,000	482,000
Earnings on bank owned life insurance	1,630,000	331,000
Other income	1,026,000	388,000
Total noninterest income	6,632,000	4,381,000
Noninterest expense
Salaries and benefits	13,015,000	12,337,000
Occupancy	1,762,000	1,772,000
Furniture and equipment depreciation, rent and maintenance	635,000	548,000
Data processing costs	2,216,000	2,128,000
Other expense	4,202,000	4,362,000
Total noninterest expenses	21,830,000	21,147,000
Income before federal income tax expense	14,597,000	13,433,000
Federal income tax expense	2,773,000	2,552,000
Net income	$ 11,824,000	$ 10,881,000
Basic earnings per share (in dollars per share)	$ 0.72	$ 0.66
Diluted earnings per share (in dollars per share)	0.72	0.66
Cash dividends per common share (in dollars per share)	$ 0.26	$ 0.22
Average basic shares outstanding (in shares)	16,429,571	16,595,115
Average diluted shares outstanding (in shares)	16,435,176	16,604,325
Deposit Account [Member]
Noninterest income:
Noninterest income	$ 1,077,000	$ 1,053,000
Credit and Debit Card [Member]
Noninterest income:
Noninterest income	1,337,000	1,243,000
Mortgage Banking [Member]
Noninterest income:
Noninterest income	$ 1,057,000	$ 884,000