Consolidated Statements of Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Interest and Loan Fee Income:
Loans	$ 11,925	$ 12,208	$ 35,510	$ 37,481
Equity securities	152	127	456	384
Debt securities available for sale	47,994	39,100	142,256	99,430
Debt securities held to maturity	8,848	6,625	26,758	10,040
Interest-bearing cash	3,929	2,742	7,981	5,223
Total Interest and Loan Fee Income	72,848	60,802	212,961	152,558
Interest Expense:
Deposits	1,095	470	2,135	1,383
Short-term borrowed funds	38	17	76	67
Total Interest Expense	1,133	487	2,211	1,450
Net Interest and Loan Fee Income	71,715	60,315	210,750	151,108
Provision (Reversal of Provision) for Credit Losses	400	0	(1,150)	0
Net Interest and Loan Fee Income After Provision (Reversal of Provision) for Credit Losses	71,315	60,315	211,900	151,108
Noninterest Income:
Life insurance gains	278	923	278	923
Securities losses	0	0	(125)	0
Other noninterest income	706	693	2,269	1,950
Total Noninterest Income	11,281	11,818	32,530	34,658
Noninterest Expense:
Salaries and related benefits	11,820	11,311	35,715	34,643
Occupancy and equipment	5,065	5,064	15,562	14,666
Outsourced data processing services	2,473	2,434	7,405	7,294
Limited partnership operating losses	1,440	1,431	4,314	4,293
Courier service	745	671	1,971	1,914
Professional fees	401	582	1,362	2,054
Other noninterest expense	3,706	3,274	11,370	9,407
Total Noninterest Expense	25,650	24,767	77,699	74,271
Income Before Income Taxes	56,946	47,366	166,731	111,495
Provision for income taxes	15,345	12,606	44,431	28,805
Net Income	$ 41,601	$ 34,760	$ 122,300	$ 82,690
Average Common Shares Outstanding (in shares)	26,648	26,906	26,718	26,889
Average Diluted Common Shares Outstanding (in shares)	26,650	26,916	26,721	26,901
Per Common Share Data:
Basic earnings (in dollars per share)	$ 1.56	$ 1.29	$ 4.58	$ 3.08
Diluted earnings (in dollars per share)	1.56	1.29	4.58	3.07
Dividends paid (in dollars per share)	$ 0.44	$ 0.42	$ 1.28	$ 1.26
Deposit Account [Member]
Noninterest Income:
Noninterest income revenue	$ 3,705	$ 3,737	$ 10,629	$ 11,006
Credit Card, Merchant Discount [Member]
Noninterest Income:
Noninterest income revenue	2,911	2,925	8,417	8,922
Debit Card [Member]
Noninterest Income:
Noninterest income revenue	1,717	1,594	5,118	6,175
Fiduciary and Trust [Member]
Noninterest Income:
Noninterest income revenue	783	810	2,358	2,462
ATM Processing Fees [Member]
Noninterest Income:
Noninterest income revenue	640	594	1,996	1,514
Financial Service, Other [Member]
Noninterest Income:
Noninterest income revenue	463	463	1,320	1,392
Financial Services Commission [Member]
Noninterest Income:
Noninterest income revenue	$ 78	$ 79	$ 270	$ 314