Loans, Credit Risk Profile Based on Rating Category and Payment Activity and on Performing and Nonperforming Status, Segregated by Loan Segment (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Credit Risk Profile, Segregated by Class [Abstract]
Total	$ 4,793,915		$ 4,793,915		$ 4,486,637
Year-to-date Gross Charge-Offs [Abstract]
Total	(4,024)	$ (2,736)	(9,274)	$ (8,239)
Consumer mortgage loans secured by real estate properties for which formal foreclosure proceedings are in process	1,700		1,700		4,000
Commercial [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	445,391		445,391		522,094
2024/2023	384,728		384,728		362,884
2023/2022	337,051		337,051		400,413
2022/2021	372,740		372,740		265,342
2021/2020	244,898		244,898		151,178
Prior	404,460		404,460		324,631
Revolving Loans	235,642		235,642		246,137
Total	2,424,910		2,424,910		2,272,679
Year-to-date Gross Charge-Offs [Abstract]
2025/2024			(559)		(1,148)
2024/2023			(1,123)		(134)
2023/2022			(366)		(142)
2022/2021			(6)		(45)
2021/2020			(213)		(2)
Prior			(5)		(5)
Revolving loan			0		0
Total			(2,272)		(1,476)
Commercial [Member] \| Pass [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	414,809		414,809		499,660
2024/2023	372,231		372,231		348,510
2023/2022	320,673		320,673		375,881
2022/2021	344,531		344,531		234,056
2021/2020	204,840		204,840		134,073
Prior	352,412		352,412		283,081
Revolving Loans	204,185		204,185		227,446
Total	2,213,681		$ 2,213,681		2,102,707
Commercial [Member] \| Pass [Member] \| Minimum [Member]
Credit Risk Profile, Segregated by Class [Abstract]
Review period for loans			12 months
Commercial [Member] \| Pass [Member] \| Maximum [Member]
Credit Risk Profile, Segregated by Class [Abstract]
Review period for loans			18 months
Commercial [Member] \| Watch [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	11,428		$ 11,428		11,778
2024/2023	8,749		8,749		7,952
2023/2022	10,343		10,343		17,189
2022/2021	21,385		21,385		19,287
2021/2020	27,628		27,628		5,059
Prior	29,163		29,163		26,122
Revolving Loans	30,087		30,087		17,282
Total	138,783		138,783		104,669
Commercial [Member] \| OAEM [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	0		0		58
2024/2023	100		100		7
2023/2022	278		278		12
2022/2021	0		0		8,469
2021/2020	8,038		8,038		0
Prior	70		70		103
Revolving Loans	245		245		30
Total	8,731		8,731		8,679
Commercial [Member] \| Substandard [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	19,154		19,154		10,598
2024/2023	3,648		3,648		6,415
2023/2022	5,757		5,757		7,331
2022/2021	6,824		6,824		3,530
2021/2020	4,392		4,392		12,046
Prior	22,814		22,814		15,324
Revolving Loans	1,125		1,125		1,379
Total	63,714		63,714		56,623
Commercial [Member] \| Doubtful [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	0		0		0
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
Prior	1		1		1
Revolving Loans	0		0		0
Total	1		1		1
Commercial [Member] \| Hotel/Motel [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	47,354		47,354		74,878
2024/2023	59,968		59,968		90,078
2023/2022	89,566		89,566		149,464
2022/2021	149,206		149,206		33,715
2021/2020	32,899		32,899		21,609
Prior	99,221		99,221		83,669
Revolving Loans	5,619		5,619		5,419
Total	483,833		483,833		458,832
Year-to-date Gross Charge-Offs [Abstract]
2025/2024			0		0
2024/2023			0		0
2023/2022			0		0
2022/2021			0		0
2021/2020			0		0
Prior			0		0
Revolving loan			0		0
Total	0	0	0	0	0
Commercial [Member] \| Hotel/Motel [Member] \| Pass [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	47,354		47,354		72,924
2024/2023	59,134		59,134		88,016
2023/2022	87,543		87,543		134,663
2022/2021	133,316		133,316		27,145
2021/2020	26,458		26,458		21,609
Prior	88,057		88,057		70,311
Revolving Loans	5,619		5,619		5,419
Total	447,481		447,481		420,087
Commercial [Member] \| Hotel/Motel [Member] \| Watch [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	0		0		0
2024/2023	0		0		2,062
2023/2022	2,023		2,023		10,822
2022/2021	12,000		12,000		6,570
2021/2020	6,441		6,441		0
Prior	11,164		11,164		13,358
Revolving Loans	0		0		0
Total	31,628		31,628		32,812
Commercial [Member] \| Hotel/Motel [Member] \| OAEM [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	0		0		0
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
Prior	0		0		0
Revolving Loans	0		0		0
Total	0		0		0
Commercial [Member] \| Hotel/Motel [Member] \| Substandard [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	0		0		1,954
2024/2023	834		834		0
2023/2022	0		0		3,979
2022/2021	3,890		3,890		0
2021/2020	0		0		0
Prior	0		0		0
Revolving Loans	0		0		0
Total	4,724		4,724		5,933
Commercial [Member] \| Hotel/Motel [Member] \| Doubtful [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	0		0		0
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
Prior	0		0		0
Revolving Loans	0		0		0
Total	0		0		0
Commercial [Member] \| Commercial Real Estate Residential [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	158,887		158,887		169,737
2024/2023	106,909		106,909		98,376
2023/2022	94,257		94,257		80,590
2022/2021	73,481		73,481		64,752
2021/2020	59,122		59,122		26,546
Prior	57,073		57,073		46,936
Revolving Loans	23,541		23,541		21,373
Total	573,270		573,270		508,310
Year-to-date Gross Charge-Offs [Abstract]
2025/2024			0		0
2024/2023			(18)		0
2023/2022			(106)		0
2022/2021			0		0
2021/2020			0		0
Prior			0		0
Revolving loan			0		0
Total	(65)	0	(124)	0	0
Commercial [Member] \| Commercial Real Estate Residential [Member] \| Pass [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	148,046		148,046		162,855
2024/2023	105,457		105,457		94,758
2023/2022	90,426		90,426		78,106
2022/2021	71,601		71,601		60,482
2021/2020	53,699		53,699		24,603
Prior	48,050		48,050		37,689
Revolving Loans	23,271		23,271		21,267
Total	540,550		540,550		479,760
Commercial [Member] \| Commercial Real Estate Residential [Member] \| Watch [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	8,780		8,780		5,381
2024/2023	942		942		3,009
2023/2022	3,281		3,281		1,692
2022/2021	1,375		1,375		3,739
2021/2020	3,586		3,586		1,523
Prior	5,577		5,577		5,261
Revolving Loans	221		221		58
Total	23,762		23,762		20,663
Commercial [Member] \| Commercial Real Estate Residential [Member] \| OAEM [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	0		0		31
2024/2023	0		0		0
2023/2022	193		193		0
2022/2021	0		0		0
2021/2020	0		0		0
Prior	53		53		58
Revolving Loans	0		0		0
Total	246		246		89
Commercial [Member] \| Commercial Real Estate Residential [Member] \| Substandard [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	2,061		2,061		1,470
2024/2023	510		510		609
2023/2022	357		357		792
2022/2021	505		505		531
2021/2020	1,837		1,837		420
Prior	3,393		3,393		3,928
Revolving Loans	49		49		48
Total	8,712		8,712		7,798
Commercial [Member] \| Commercial Real Estate Residential [Member] \| Doubtful [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	0		0		0
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
Prior	0		0		0
Revolving Loans	0		0		0
Total	0		0		0
Commercial [Member] \| Commercial Real Estate Nonresidential [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	148,236		148,236		189,586
2024/2023	172,823		172,823		125,339
2023/2022	113,828		113,828		128,573
2022/2021	118,361		118,361		132,006
2021/2020	121,902		121,902		77,278
Prior	206,745		206,745		173,355
Revolving Loans	39,787		39,787		38,894
Total	921,682		921,682		865,031
Year-to-date Gross Charge-Offs [Abstract]
2025/2024			0		0
2024/2023			(1,000)		0
2023/2022			0		0
2022/2021			0		0
2021/2020			0		0
Prior			(2)		0
Revolving loan			0		0
Total	(1,000)	0	(1,002)	0	0
Commercial [Member] \| Commercial Real Estate Nonresidential [Member] \| Pass [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	143,099		143,099		180,139
2024/2023	164,868		164,868		121,801
2023/2022	107,456		107,456		124,200
2022/2021	109,097		109,097		120,623
2021/2020	102,079		102,079		62,674
Prior	175,799		175,799		155,561
Revolving Loans	38,952		38,952		38,270
Total	841,350		841,350		803,268
Commercial [Member] \| Commercial Real Estate Nonresidential [Member] \| Watch [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	1,561		1,561		4,574
2024/2023	6,740		6,740		2,004
2023/2022	4,242		4,242		4,004
2022/2021	7,192		7,192		8,683
2021/2020	17,437		17,437		3,425
Prior	11,933		11,933		6,970
Revolving Loans	835		835		624
Total	49,940		49,940		30,284
Commercial [Member] \| Commercial Real Estate Nonresidential [Member] \| OAEM [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	0		0		0
2024/2023	100		100		7
2023/2022	0		0		12
2022/2021	0		0		0
2021/2020	0		0		0
Prior	17		17		45
Revolving Loans	0		0		0
Total	117		117		64
Commercial [Member] \| Commercial Real Estate Nonresidential [Member] \| Substandard [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	3,576		3,576		4,873
2024/2023	1,115		1,115		1,527
2023/2022	2,130		2,130		357
2022/2021	2,072		2,072		2,700
2021/2020	2,386		2,386		11,179
Prior	18,995		18,995		10,778
Revolving Loans	0		0		0
Total	30,274		30,274		31,414
Commercial [Member] \| Commercial Real Estate Nonresidential [Member] \| Doubtful [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	0		0		0
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
Prior	1		1		1
Revolving Loans	0		0		0
Total	1		1		1
Commercial [Member] \| Dealer Floorplans [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	0		0		0
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
Prior	0		0		456
Revolving Loans	73,842		73,842		84,500
Total	73,842		73,842		84,956
Year-to-date Gross Charge-Offs [Abstract]
2025/2024			0		0
2024/2023			0		0
2023/2022			0		0
2022/2021			0		0
2021/2020			0		0
Prior			0		0
Revolving loan			0		0
Total	0	0	0	0	0
Commercial [Member] \| Dealer Floorplans [Member] \| Pass [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	0		0		0
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
Prior	0		0		0
Revolving Loans	64,610		64,610		82,639
Total	64,610		64,610		82,639
Commercial [Member] \| Dealer Floorplans [Member] \| Watch [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	0		0		0
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
Prior	0		0		0
Revolving Loans	8,953		8,953		1,861
Total	8,953		8,953		1,861
Commercial [Member] \| Dealer Floorplans [Member] \| OAEM [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	0		0		0
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
Prior	0		0		0
Revolving Loans	0		0		0
Total	0		0		0
Commercial [Member] \| Dealer Floorplans [Member] \| Substandard [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	0		0		0
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
Prior	0		0		456
Revolving Loans	279		279		0
Total	279		279		456
Commercial [Member] \| Dealer Floorplans [Member] \| Doubtful [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	0		0		0
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
Prior	0		0		0
Revolving Loans	0		0		0
Total	0		0		0
Commercial [Member] \| Commercial Other [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	90,914		90,914		87,893
2024/2023	45,028		45,028		49,091
2023/2022	39,400		39,400		41,786
2022/2021	31,692		31,692		34,869
2021/2020	30,975		30,975		25,745
Prior	41,421		41,421		20,215
Revolving Loans	92,853		92,853		95,951
Total	372,283		372,283		355,550
Year-to-date Gross Charge-Offs [Abstract]
2025/2024			(559)		(1,148)
2024/2023			(105)		(134)
2023/2022			(260)		(142)
2022/2021			(6)		(45)
2021/2020			(213)		(2)
Prior			(3)		(5)
Revolving loan			0		0
Total			(1,146)		(1,476)
Commercial [Member] \| Commercial Other [Member] \| Pass [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	76,310		76,310		83,742
2024/2023	42,772		42,772		43,935
2023/2022	35,248		35,248		38,912
2022/2021	30,517		30,517		25,806
2021/2020	22,604		22,604		25,187
Prior	40,506		40,506		19,520
Revolving Loans	71,733		71,733		79,851
Total	319,690		319,690		316,953
Commercial [Member] \| Commercial Other [Member] \| Watch [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	1,087		1,087		1,823
2024/2023	1,067		1,067		877
2023/2022	797		797		671
2022/2021	818		818		295
2021/2020	164		164		111
Prior	489		489		533
Revolving Loans	20,078		20,078		14,739
Total	24,500		24,500		19,049
Commercial [Member] \| Commercial Other [Member] \| OAEM [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	0		0		27
2024/2023	0		0		0
2023/2022	85		85		0
2022/2021	0		0		8,469
2021/2020	8,038		8,038		0
Prior	0		0		0
Revolving Loans	245		245		30
Total	8,368		8,368		8,526
Commercial [Member] \| Commercial Other [Member] \| Substandard [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	13,517		13,517		2,301
2024/2023	1,189		1,189		4,279
2023/2022	3,270		3,270		2,203
2022/2021	357		357		299
2021/2020	169		169		447
Prior	426		426		162
Revolving Loans	797		797		1,331
Total	19,725		19,725		11,022
Commercial [Member] \| Commercial Other [Member] \| Doubtful [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	0		0		0
2024/2023	0		0		0
2023/2022	0		0		0
2022/2021	0		0		0
2021/2020	0		0		0
Prior	0		0		0
Revolving Loans	0		0		0
Total	0		0		0
Residential [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	201,803		201,803		197,756
2024/2023	191,995		191,995		194,033
2023/2022	176,213		176,213		141,689
2022/2021	133,722		133,722		146,641
2021/2020	137,416		137,416		107,288
Prior	322,483		322,483		263,477
Revolving Loans	178,099		178,099		159,942
Total	1,341,731		1,341,731		1,210,826
Year-to-date Gross Charge-Offs [Abstract]
2025/2024			0		0
2024/2023			0		0
2023/2022			0		0
2022/2021			(37)		(28)
2021/2020			(16)		0
Prior			(196)		(177)
Revolving loan			0		0
Total			(249)		(205)
Residential [Member] \| Performing [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	201,267		201,267		197,756
2024/2023	190,959		190,959		192,959
2023/2022	175,386		175,386		140,265
2022/2021	132,403		132,403		146,391
2021/2020	136,866		136,866		107,009
Prior	319,129		319,129		257,322
Revolving Loans	177,577		177,577		159,656
Total	1,333,587		1,333,587		1,201,358
Residential [Member] \| Nonperforming [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	536		536		0
2024/2023	1,036		1,036		1,074
2023/2022	827		827		1,424
2022/2021	1,319		1,319		250
2021/2020	550		550		279
Prior	3,354		3,354		6,155
Revolving Loans	522		522		286
Total	8,144		8,144		9,468
Residential [Member] \| Real Estate Mortgage [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	201,803		201,803		197,756
2024/2023	191,995		191,995		194,033
2023/2022	176,213		176,213		141,689
2022/2021	133,722		133,722		146,641
2021/2020	137,416		137,416		107,288
Prior	316,391		316,391		255,994
Revolving Loans	0		0		0
Total	1,157,540		1,157,540		1,043,401
Year-to-date Gross Charge-Offs [Abstract]
2025/2024			0		0
2024/2023			0		0
2023/2022			0		(28)
2022/2021			(37)		0
2021/2020			(16)		0
Prior			(189)		(97)
Revolving loan			0		0
Total			(242)		(125)
Residential [Member] \| Real Estate Mortgage [Member] \| Performing [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	201,267		201,267		197,756
2024/2023	190,959		190,959		192,959
2023/2022	175,386		175,386		140,265
2022/2021	132,403		132,403		146,391
2021/2020	136,866		136,866		107,009
Prior	313,244		313,244		250,201
Revolving Loans	0		0		0
Total	1,150,125		1,150,125		1,034,581
Residential [Member] \| Real Estate Mortgage [Member] \| Nonperforming [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2025/2024	536		536		0
2024/2023	1,036		1,036		1,074
2023/2022	827		827		1,424
2022/2021	1,319		1,319		250

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