Consolidated Statements of Income (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Interest income
Loans, including fees	$ 33,664,000	$ 37,005,000	$ 101,428,000	$ 109,559,000
Securities, taxable	1,212,000	2,104,000	6,840,000	5,930,000
Securities, tax-exempt	576,000	556,000	1,714,000	1,657,000
Other interest-earning assets	142,000	651,000	711,000	1,627,000
Total interest income	35,594,000	40,316,000	110,693,000	118,773,000
Interest expense
Deposits	3,466,000	5,573,000	11,808,000	15,906,000
Short-term borrowings	38,000	71,000	132,000	244,000
Federal Home Loan Bank advances	2,072,000	2,257,000	6,499,000	6,751,000
Subordinated debentures and other borrowings	509,000	810,000	1,857,000	2,506,000
Total interest expense	6,085,000	8,711,000	20,296,000	25,407,000
Net interest income	29,509,000	31,605,000	90,397,000	93,366,000
Provision for loan losses	3,200,000	700,000	11,550,000	2,450,000
Net interest income after provision for loan losses	26,309,000	30,905,000	78,847,000	90,916,000
Noninterest income:
Mortgage banking income	9,479,000	2,889,000	19,746,000	5,291,000
Payroll services income	399,000	367,000	1,346,000	1,227,000
Earnings on bank owned life insurance	290,000	330,000	933,000	3,567,000
Other income	368,000	358,000	1,042,000	1,755,000
Total noninterest income	13,307,000	6,676,000	30,839,000	19,643,000
Noninterest expense
Salaries and benefits	16,734,000	13,680,000	44,388,000	39,982,000
Occupancy	2,023,000	1,697,000	5,944,000	5,089,000
Furniture and equipment depreciation, rent and maintenance	871,000	629,000	2,500,000	1,885,000
Data processing costs	2,676,000	2,342,000	7,793,000	6,854,000
Other expense	4,119,000	3,679,000	11,954,000	12,134,000
Total noninterest expense	26,423,000	22,027,000	72,579,000	65,944,000
Income before federal income tax expense	13,193,000	15,554,000	37,107,000	44,615,000
Federal income tax expense	2,507,000	2,954,000	7,051,000	8,476,000
Net income	$ 10,686,000	$ 12,600,000	$ 30,056,000	$ 36,139,000
Basic earnings per share (in dollars per share)	$ 0.66	$ 0.77	$ 1.85	$ 2.20
Diluted earnings per share (in dollars per share)	0.66	0.77	1.85	2.20
Common Stock, Dividends, Per Share, Cash Paid (in dollars per share)	$ 0.28	$ 0.27	$ 0.84	$ 0.79
Average basic shares outstanding (in shares)	16,233,196	16,390,203	16,265,208	16,415,843
Average diluted shares outstanding (in shares)	16,233,666	16,393,078	16,265,986	16,420,845
Deposit Account [Member]
Noninterest income:
Noninterest income	$ 1,135,000	$ 1,185,000	$ 3,401,000	$ 3,406,000
Credit and Debit Card [Member]
Noninterest income:
Noninterest income	$ 1,636,000	$ 1,547,000	$ 4,371,000	$ 4,397,000