Consolidated Statements Of Income (Unaudited) - USD ($) shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Interest Income
Interest and fees on loans	$ 55,582,000	$ 38,493,000	$ 154,939,000	$ 103,575,000
Interest and dividends on investment securities:
Taxable	12,432,000	9,556,000	35,999,000	23,327,000
Tax-exempt	910,000	1,228,000	3,022,000	3,650,000
Interest on deposits in depository institutions	1,265,000	1,530,000	5,440,000	2,549,000
Total Interest Income	70,189,000	50,807,000	199,400,000	133,101,000
Interest Expense
Interest on deposits	10,551,000	1,585,000	24,808,000	4,433,000
Interest on customer repurchase agreements	2,990,000	440,000	8,334,000	677,000
Interest on FHLB long-term advances	1,034,000	0	1,683,000	0
Total Interest Expense	14,575,000	2,025,000	34,825,000	5,110,000
Net Interest Income	55,614,000	48,782,000	164,575,000	127,991,000
Provision for (recovery of) credit losses	200,000	730,000	3,543,000	(26,000)
Net Interest Income After Provision for (Recovery of) Credit Losses	55,414,000	48,052,000	161,032,000	128,017,000
Non-Interest Income
(Losses) gains on sale of investment securities, net	(730,000)	0	43,000	0
Unrealized gains (losses) recognized on equity securities still held, net	0	1,000	67,000	(1,322,000)
Bank owned  life insurance	807,000	754,000	4,819,000	3,746,000
Other income	742,000	792,000	3,020,000	2,825,000
Total Non-Interest Income	17,410,000	18,244,000	56,393,000	53,543,000
Non-Interest Expense
Salaries and employee benefits	18,289,000	17,398,000	54,391,000	49,386,000
Occupancy related expense	2,950,000	2,664,000	8,401,000	7,993,000
Equipment and software related expense	2,830,000	2,949,000	8,805,000	8,452,000
FDIC insurance expense	919,000	416,000	2,054,000	1,259,000
Advertising	790,000	854,000	2,524,000	2,603,000
Bankcard expenses	2,188,000	1,405,000	5,433,000	4,676,000
Postage, delivery, and statement mailings	668,000	578,000	1,911,000	1,765,000
Office supplies	457,000	466,000	1,468,000	1,303,000
Legal and professional fees	529,000	532,000	1,557,000	1,584,000
Telecommunications	568,000	651,000	1,797,000	1,988,000
Repossessed asset losses (gains), net of expenses	40,000	(3,000)	78,000	4,000
Merger related expenses	2,000	0	5,647,000	0
Other expenses	4,798,000	3,591,000	14,346,000	10,701,000
Total Non-Interest Expense	35,028,000	31,501,000	108,412,000	91,714,000
Income Before Income Taxes	37,796,000	34,795,000	109,013,000	89,846,000
Income tax expense	7,957,000	7,421,000	22,100,000	18,438,000
Net Income Available to Common Shareholders	$ 29,839,000	$ 27,374,000	$ 86,913,000	$ 71,408,000
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]
Average shares outstanding, basic (in shares)	14,922	14,776	14,906	14,878
Effect of dilutive securities (in shares)	23	24	22	23
Average shares outstanding, diluted (in shares)	14,945	14,800	14,928	14,901
Earnings Per Share [Abstract]
Basic earnings per common share (in dollars per share)	$ 1.98	$ 1.84	$ 5.78	$ 4.75
Diluted earnings per common share (in dollars per share)	$ 1.98	$ 1.83	$ 5.77	$ 4.75
Service charges
Non-Interest Income
Revenue from contract with customer	$ 7,124,000	$ 7,487,000	$ 20,593,000	$ 21,281,000
Bankcard revenue
Non-Interest Income
Revenue from contract with customer	7,058,000	7,052,000	20,851,000	20,558,000
Trust and investment management fee income
Non-Interest Income
Revenue from contract with customer	$ 2,409,000	$ 2,158,000	$ 7,000,000	$ 6,455,000