Loans and Allowance for Credit Losses (Loan Risk Ratings) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Credit quality categories
Prior	$ 1,226,329		$ 1,226,329		$ 1,059,173
2020 & 2019	418,520		418,520		277,491
2021 & 2020	792,573		792,573		461,213
2022 & 2021	1,070,281		1,070,281		837,657
2023 & 2022	659,094		659,094		1,107,579
2024 & 2023	317,035		317,035		670,765
Revolving Loans	232,924		232,924		201,381
Revolving Converted to Term Loans	17,153		17,153		25,751
Total	4,733,909		4,733,909		4,641,010
Current period gross charge-offs
Total gross charge-offs	(1,379)	$ (1,502)	(2,996)	$ (1,786)
Loans Evaluated By Performing Status
Credit quality categories
Prior	0		0		0
2020 & 2019	0		0		0
2021 & 2020	0		0		0
2022 & 2021	0		0		0
2023 & 2022	0		0		0
2024 & 2023	0		0		0
Revolving Loans	7,185		7,185		6,583
Revolving Converted to Term Loans	0		0		0
Total	7,185		7,185		6,583
Current period gross charge-offs
Gross charge-offs, prior			0		0
Gross charge-offs, 2020 & 2019			0		0
Gross charge-offs, 2021 & 2020			0		0
Gross charge-offs, 2022 & 2021			0		0
Gross charge-offs, 2023 & 2022			0		0
Gross charge-offs, 2024 & 2023			0		0
Revolving Loans			(405)		(111)
Revolving Converted to Term Loans			0		0
Total gross charge-offs			(405)		(111)
Total loans by risk category
Credit quality categories
Prior	1,226,329		1,226,329		1,059,173
2020 & 2019	418,520		418,520		277,491
2021 & 2020	792,573		792,573		461,213
2022 & 2021	1,070,281		1,070,281		837,657
2023 & 2022	659,094		659,094		1,107,579
2024 & 2023	317,035		317,035		670,765
Revolving Loans	225,739		225,739		194,798
Revolving Converted to Term Loans	17,153		17,153		25,751
Total	4,726,724		4,726,724		4,634,427
Current period gross charge-offs
Gross charge-offs, prior			(591)		(1,035)
Gross charge-offs, 2020 & 2019			(20)		0
Gross charge-offs, 2021 & 2020			(229)		(830)
Gross charge-offs, 2022 & 2021			(1,634)		(17)
Gross charge-offs, 2023 & 2022			(100)		(8)
Gross charge-offs, 2024 & 2023			0		(4)
Revolving Loans			(17)		(126)
Revolving Converted to Term Loans			0		(242)
Total gross charge-offs			(2,591)		(2,262)
Pass
Credit quality categories
Prior	1,205,259		1,205,259		1,035,412
2020 & 2019	417,987		417,987		274,768
2021 & 2020	782,631		782,631		460,644
2022 & 2021	1,067,960		1,067,960		830,594
2023 & 2022	658,114		658,114		1,101,448
2024 & 2023	317,035		317,035		670,765
Revolving Loans	223,988		223,988		192,565
Revolving Converted to Term Loans	16,733		16,733		25,296
Total	4,689,707		4,689,707		4,591,492
Special Mention
Credit quality categories
Prior	7,677		7,677		15,283
2020 & 2019	530		530		587
2021 & 2020	5,428		5,428		564
2022 & 2021	0		0		6,429
2023 & 2022	0		0		4,446
2024 & 2023	0		0		0
Revolving Loans	694		694		545
Revolving Converted to Term Loans	69		69		409
Total	14,398		14,398		28,263
Substandard
Credit quality categories
Prior	13,393		13,393		8,478
2020 & 2019	3		3		2,136
2021 & 2020	4,514		4,514		5
2022 & 2021	2,321		2,321		634
2023 & 2022	980		980		1,685
2024 & 2023	0		0		0
Revolving Loans	1,057		1,057		1,688
Revolving Converted to Term Loans	351		351		46
Total	22,619		22,619		14,672
Construction
Credit quality categories
Prior	33,531		33,531		23,649
2020 & 2019	10,572		10,572		15,721
2021 & 2020	24,666		24,666		14,773
2022 & 2021	79,575		79,575		34,337
2023 & 2022	90,132		90,132		101,844
2024 & 2023	76,594		76,594		100,620
Revolving Loans	20,283		20,283		8,056
Revolving Converted to Term Loans	1,760		1,760		0
Total	337,113		337,113		299,000
Current period gross charge-offs
Gross charge-offs, prior			0		0
Gross charge-offs, 2020 & 2019			0		0
Gross charge-offs, 2021 & 2020			(12)		0
Gross charge-offs, 2022 & 2021			0		0
Gross charge-offs, 2023 & 2022			0		0
Gross charge-offs, 2024 & 2023			0		0
Revolving Loans			0		0
Revolving Converted to Term Loans			0		0
Total gross charge-offs	0	0	(12)	0	0
Construction | Pass
Credit quality categories
Prior	33,471		33,471		23,450
2020 & 2019	10,572		10,572		15,721
2021 & 2020	24,666		24,666		14,773
2022 & 2021	79,428		79,428		34,325
2023 & 2022	90,132		90,132		101,426
2024 & 2023	76,594		76,594		100,620
Revolving Loans	20,283		20,283		8,056
Revolving Converted to Term Loans	1,760		1,760		0
Total	336,906		336,906		298,371
Construction | Substandard
Credit quality categories
Prior	60		60		199
2020 & 2019	0		0		0
2021 & 2020	0		0		0
2022 & 2021	147		147		12
2023 & 2022	0		0		418
2024 & 2023	0		0		0
Revolving Loans	0		0		0
Revolving Converted to Term Loans	0		0		0
Total	207		207		629
Residential real estate
Credit quality categories
Prior	348,919		348,919		323,682
2020 & 2019	101,608		101,608		54,643
2021 & 2020	244,042		244,042		105,833
2022 & 2021	402,357		402,357		251,772
2023 & 2022	255,629		255,629		392,378
2024 & 2023	82,959		82,959		239,914
Revolving Loans	121,360		121,360		121,342
Revolving Converted to Term Loans	14,124		14,124		874
Total	1,570,998		1,570,998		1,490,438
Current period gross charge-offs
Gross charge-offs, prior			(1)		0
Gross charge-offs, 2020 & 2019			0		0
Gross charge-offs, 2021 & 2020			0		0
Gross charge-offs, 2022 & 2021			0		0
Gross charge-offs, 2023 & 2022			0		0
Gross charge-offs, 2024 & 2023			0		0
Revolving Loans			0		(119)
Revolving Converted to Term Loans			0		0
Total gross charge-offs	0	0	(1)	0	(119)
Residential real estate | Pass
Credit quality categories
Prior	343,013		343,013		317,528
2020 & 2019	101,078		101,078		54,387
2021 & 2020	242,689		242,689		105,269
2022 & 2021	402,062		402,062		251,269
2023 & 2022	255,274		255,274		392,378
2024 & 2023	82,959		82,959		239,914
Revolving Loans	120,721		120,721		119,777
Revolving Converted to Term Loans	14,124		14,124		874
Total	1,561,920		1,561,920		1,481,396
Residential real estate | Special Mention
Credit quality categories
Prior	395		395		154
2020 & 2019	530		530		256
2021 & 2020	0		0		564
2022 & 2021	0		0		503
2023 & 2022	0		0		0
2024 & 2023	0		0		0
Revolving Loans	163		163		192
Revolving Converted to Term Loans	0		0		0
Total	1,088		1,088		1,669
Residential real estate | Substandard
Credit quality categories
Prior	5,511		5,511		6,000
2020 & 2019	0		0		0
2021 & 2020	1,353		1,353		0
2022 & 2021	295		295		0
2023 & 2022	355		355		0
2024 & 2023	0		0		0
Revolving Loans	476		476		1,373
Revolving Converted to Term Loans	0		0		0
Total	7,990		7,990		7,373
Commercial real estate
Credit quality categories
Prior	814,945		814,945		687,147
2020 & 2019	282,792		282,792		193,113
2021 & 2020	415,539		415,539		311,980
2022 & 2021	432,621		432,621		432,793
2023 & 2022	213,652		213,652		432,686
2024 & 2023	82,252		82,252		210,915
Revolving Loans	34,580		34,580		14,973
Revolving Converted to Term Loans	0		0		2,547
Total	2,276,381		2,276,381		2,286,154
Current period gross charge-offs
Gross charge-offs, prior			0		(512)
Gross charge-offs, 2020 & 2019			0		0
Gross charge-offs, 2021 & 2020			0		(814)
Gross charge-offs, 2022 & 2021			0		0
Gross charge-offs, 2023 & 2022			0		0
Gross charge-offs, 2024 & 2023			0		0
Revolving Loans			0		0
Revolving Converted to Term Loans			0		0
Total gross charge-offs	0	(1,327)	0	(1,327)	(1,326)
Commercial real estate | Pass
Credit quality categories
Prior	800,556		800,556		670,042
2020 & 2019	282,792		282,792		190,753
2021 & 2020	407,056		407,056		311,980
2022 & 2021	432,621		432,621		426,750
2023 & 2022	213,652		213,652		428,240
2024 & 2023	82,252		82,252		210,915
Revolving Loans	34,021		34,021		14,873
Revolving Converted to Term Loans	0		0		2,138
Total	2,252,950		2,252,950		2,255,691
Commercial real estate | Special Mention
Credit quality categories
Prior	7,162		7,162		14,986
2020 & 2019	0		0		331
2021 & 2020	5,428		5,428		0
2022 & 2021	0		0		5,501
2023 & 2022	0		0		4,446
2024 & 2023	0		0		0
Revolving Loans	531		531		100
Revolving Converted to Term Loans	0		0		409
Total	13,121		13,121		25,773
Commercial real estate | Substandard
Credit quality categories
Prior	7,227		7,227		2,119
2020 & 2019	0		0		2,029
2021 & 2020	3,055		3,055		0
2022 & 2021	0		0		542
2023 & 2022	0		0		0
2024 & 2023	0		0		0
Revolving Loans	28		28		0
Revolving Converted to Term Loans	0		0		0
Total	10,310		10,310		4,690
Commercial
Credit quality categories
Prior	28,043		28,043		24,074
2020 & 2019	11,866		11,866		13,015
2021 & 2020	43,595		43,595		14,464
2022 & 2021	32,505		32,505		42,046
2023 & 2022	30,802		30,802		36,384
2024 & 2023	28,198		28,198		27,901
Revolving Loans	48,805		48,805		49,725
Revolving Converted to Term Loans	1,269		1,269		22,330
Total	225,083		225,083		229,939
Current period gross charge-offs
Gross charge-offs, prior			(45)		(1)
Gross charge-offs, 2020 & 2019			(11)		0
Gross charge-offs, 2021 & 2020			0
Gross charge-offs, 2022 & 2021			(56)		0
Gross charge-offs, 2023 & 2022			(65)		0
Gross charge-offs, 2024 & 2023			0		0
Revolving Loans			0		0
Revolving Converted to Term Loans			0		(242)
Total gross charge-offs	(154)	0	(177)	0	(243)
Commercial | Pass
Credit quality categories
Prior	27,330		27,330		23,771
2020 & 2019	11,866		11,866		12,946
2021 & 2020	43,586		43,586		14,464
2022 & 2021	31,181		31,181		41,621
2023 & 2022	30,278		30,278		35,897
2024 & 2023	28,198		28,198		27,901
Revolving Loans	48,252		48,252		49,160
Revolving Converted to Term Loans	849		849		22,284
Total	221,540		221,540		228,044
Commercial | Special Mention
Credit quality categories
Prior	120		120		143
2020 & 2019	0		0		0
2021 & 2020	0		0		0
2022 & 2021	0		0		425
2023 & 2022	0		0		0
2024 & 2023	0		0		0
Revolving Loans	0		0		251
Revolving Converted to Term Loans	69		69		0
Total	189		189		819
Commercial | Substandard
Credit quality categories
Prior	593		593		160
2020 & 2019	0		0		69
2021 & 2020	9		9		0
2022 & 2021	1,324		1,324		0
2023 & 2022	524		524		487
2024 & 2023	0		0		0
Revolving Loans	553		553		314
Revolving Converted to Term Loans	351		351		46
Total	3,354		3,354		1,076
Consumer
Credit quality categories
Prior	891		891		621
2020 & 2019	11,682		11,682		999
2021 & 2020	64,731		64,731		14,163
2022 & 2021	123,223		123,223		76,709
2023 & 2022	68,879		68,879		144,287
2024 & 2023	47,032		47,032		91,415
Revolving Loans	711		711		702
Revolving Converted to Term Loans	0		0		0
Total	317,149		317,149		328,896
Current period gross charge-offs
Gross charge-offs, prior			(545)		(522)
Gross charge-offs, 2020 & 2019			(9)		0
Gross charge-offs, 2021 & 2020			(217)		(16)
Gross charge-offs, 2022 & 2021			(1,578)		(17)
Gross charge-offs, 2023 & 2022			(35)		(8)
Gross charge-offs, 2024 & 2023			0		(4)
Revolving Loans			(17)		(7)
Revolving Converted to Term Loans			0		0
Total gross charge-offs	(1,015)	$ (115)	(2,401)	(399)	(574)
Consumer | Pass
Credit quality categories
Prior	889		889		621
2020 & 2019	11,679		11,679		961
2021 & 2020	64,634		64,634		14,158
2022 & 2021	122,668		122,668		76,629
2023 & 2022	68,778		68,778		143,507
2024 & 2023	47,032		47,032		91,415
Revolving Loans	711		711		699
Revolving Converted to Term Loans	0		0		0
Total	316,391		316,391		327,990
Consumer | Special Mention
Credit quality categories
Prior	0		0		0
2020 & 2019	0		0		0
2021 & 2020	0		0		0
2022 & 2021	0		0		0
2023 & 2022	0		0		0
2024 & 2023	0		0		0
Revolving Loans	0		0		2
Revolving Converted to Term Loans	0		0		0
Total	0		0		2
Consumer | Substandard
Credit quality categories
Prior	2		2		0
2020 & 2019	3		3		38
2021 & 2020	97		97		5
2022 & 2021	555		555		80
2023 & 2022	101		101		780
2024 & 2023	0		0		0
Revolving Loans	0		0		1
Revolving Converted to Term Loans	0		0		0
Total	758		758		904
Credit cards
Credit quality categories
Prior	0		0		0
2020 & 2019	0		0		0
2021 & 2020	0		0		0
2022 & 2021	0		0		0
2023 & 2022	0		0		0
2024 & 2023	0		0		0
Revolving Loans	7,185		7,185		6,583
Revolving Converted to Term Loans	0		0		0
Total	7,185		7,185		6,583
Current period gross charge-offs
Gross charge-offs, prior			0		0
Gross charge-offs, 2020 & 2019			0		0
Gross charge-offs, 2021 & 2020			0		0
Gross charge-offs, 2022 & 2021			0		0
Gross charge-offs, 2023 & 2022			0		0
Gross charge-offs, 2024 & 2023			0		0
Revolving Loans			(405)		(111)
Revolving Converted to Term Loans			0		0
Total gross charge-offs	(210)		(405)	$ (60)	(111)
Credit cards | Performing
Credit quality categories
Prior	0		0		0
2020 & 2019	0		0		0
2021 & 2020	0		0		0
2022 & 2021	0		0		0
2023 & 2022	0		0		0
2024 & 2023	0		0		0
Revolving Loans	7,006		7,006		6,583
Revolving Converted to Term Loans	0		0		0
Total	7,006		7,006		6,583
Credit cards | Non-Performing
Credit quality categories
Prior	0		0		0
2020 & 2019	0		0		0
2021 & 2020	0		0		0
2022 & 2021	0		0		0
2023 & 2022	0		0		0
2024 & 2023	0		0		0
Revolving Loans	179		179		0
Revolving Converted to Term Loans	0		0		0
Total	$ 179		$ 179		$ 0