Loans, Credit Risk Profile Based on Rating Category and Payment Activity and on Performing and Nonperforming Status, Segregated by Class (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Credit Risk Profile, Segregated by Class [Abstract]
Total	$ 4,161,175		$ 4,050,906
Current Period Gross Charge-Offs [Abstract]
Total	(2,667)	$ (1,765)	(8,259)
Consumer mortgage loans secured by real estate properties for which formal foreclosure proceedings are in process	3,100		3,500
Commercial [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	155,118		437,884
2023/2022	410,634		443,860
2022/2021	436,721		325,078
2022/2020	317,735		168,851
2020/2019	165,149		122,166
Prior	380,729		276,521
Revolving Loans	219,084		209,375
Total	2,085,170		1,983,735
Current Period Gross Charge-Offs [Abstract]
2024/2023	(145)		(725)
2023/2022	0		(710)
2022/2021	(20)		(337)
2021/2020	0		(27)
2020/2019	(2)		(90)
Prior	0		(333)
Revolving loan	0		0
Total	(167)		(2,222)
Commercial [Member] \| Pass [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	152,516		411,703
2023/2022	385,738		424,100
2022/2021	417,322		303,445
2022/2020	296,743		146,909
2020/2019	143,413		113,411
Prior	340,021		241,655
Revolving Loans	210,820		202,377
Total	$ 1,946,573		1,843,600
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]
2024/2023	$ 548		15,576
2023/2022	14,953		9,730
2022/2021	10,725		14,182
2022/2020	13,710		8,491
2020/2019	8,405		6,259
Prior	20,229		14,645
Revolving Loans	7,012		6,355
Total	75,582		75,238
Commercial [Member] \| OAEM [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	0		2,404
2023/2022	28		3,997
2022/2021	3,997		0
2022/2020	0		7,255
2020/2019	7,255		0
Prior	3,475		3,503
Revolving Loans	30		30
Total	14,785		17,189
Commercial [Member] \| Substandard [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	2,054		8,201
2023/2022	9,915		6,033
2022/2021	4,560		7,451
2022/2020	7,249		6,196
2020/2019	6,076		2,496
Prior	17,002		15,952
Revolving Loans	1,222		613
Total	48,078		46,942
Commercial [Member] \| Doubtful [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	0		0
2023/2022	0		0
2022/2021	117		0
2022/2020	33		0
2020/2019	0		0
Prior	2		766
Revolving Loans	0		0
Total	152		766
Commercial [Member] \| Hotel/Motel [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	23,157		91,220
2023/2022	87,108		151,634
2022/2021	154,865		34,846
2022/2020	34,534		22,287
2020/2019	22,142		44,234
Prior	89,807		47,502
Revolving Loans	5,146		4,042
Total	416,759		395,765
Current Period Gross Charge-Offs [Abstract]
Total	0	0	0
Commercial [Member] \| Hotel/Motel [Member] \| Pass [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	23,157		79,651
2023/2022	75,614		144,826
2022/2021	148,082		28,011
2022/2020	27,789		17,664
2020/2019	17,576		40,873
Prior	81,081		42,030
Revolving Loans	5,146		4,042
Total	378,445		357,097
Commercial [Member] \| Hotel/Motel [Member] \| Watch [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	0		11,569
2023/2022	11,494		2,826
2022/2021	2,801		6,835
2022/2020	6,745		4,623
2020/2019	4,566		3,361
Prior	4,925		1,648
Revolving Loans	0		0
Total	30,531		30,862
Commercial [Member] \| Hotel/Motel [Member] \| OAEM [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	0		0
2023/2022	0		3,982
2022/2021	3,982		0
2022/2020	0		0
2020/2019	0		0
Prior	1,954		1,954
Revolving Loans	0		0
Total	5,936		5,936
Commercial [Member] \| Hotel/Motel [Member] \| Substandard [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2022/2020	0		0
2020/2019	0		0
Prior	1,847		1,118
Revolving Loans	0		0
Total	1,847		1,118
Commercial [Member] \| Hotel/Motel [Member] \| Doubtful [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2022/2020	0		0
2020/2019	0		0
Prior	0		752
Revolving Loans	0		0
Total	0		752
Commercial [Member] \| Commercial Real Estate Residential [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	53,595		112,381
2023/2022	103,882		92,104
2022/2021	92,462		103,901
2022/2020	101,464		33,201
2020/2019	32,185		12,914
Prior	56,812		48,618
Revolving Loans	16,185		14,824
Total	456,585		417,943
Current Period Gross Charge-Offs [Abstract]
2024/2023			0
2023/2022			0
2022/2021			(28)
2021/2020			0
2020/2019			0
Prior			0
Revolving loan			0
Total	0	0	(28)
Commercial [Member] \| Commercial Real Estate Residential [Member] \| Pass [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	53,504		109,304
2023/2022	100,676		89,119
2022/2021	88,387		98,896
2022/2020	96,851		30,972
2020/2019	30,029		11,908
Prior	44,984		36,964
Revolving Loans	15,866		14,700
Total	430,297		391,863
Commercial [Member] \| Commercial Real Estate Residential [Member] \| Watch [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	91		2,317
2023/2022	2,211		2,131
2022/2021	3,661		473
2022/2020	425		1,395
2020/2019	1,422		721
Prior	6,830		6,359
Revolving Loans	177		124
Total	14,817		13,520
Commercial [Member] \| Commercial Real Estate Residential [Member] \| OAEM [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2022/2020	0		0
2020/2019	0		0
Prior	62		63
Revolving Loans	0		0
Total	62		63
Commercial [Member] \| Commercial Real Estate Residential [Member] \| Substandard [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	0		760
2023/2022	995		854
2022/2021	414		4,532
2022/2020	4,188		834
2020/2019	734		285
Prior	4,936		5,232
Revolving Loans	142		0
Total	11,409		12,497
Commercial [Member] \| Commercial Real Estate Residential [Member] \| Doubtful [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2022/2020	0		0
2020/2019	0		0
Prior	0		0
Revolving Loans	0		0
Total	0		0
Commercial [Member] \| Commercial Real Estate Nonresidential [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	50,620		155,080
2023/2022	157,212		147,857
2022/2021	140,835		144,933
2022/2020	142,196		82,314
2020/2019	80,898		59,788
Prior	209,619		156,775
Revolving Loans	32,524		31,890
Total	813,904		778,637
Current Period Gross Charge-Offs [Abstract]
2024/2023			0
2023/2022			0
2022/2021			(7)
2021/2020			0
2020/2019			0
Prior			(287)
Revolving loan			0
Total	0	0	(294)
Commercial [Member] \| Commercial Real Estate Nonresidential [Member] \| Pass [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	50,150		149,633
2023/2022	152,323		142,580
2022/2021	135,583		136,090
2022/2020	133,424		68,240
2020/2019	66,865		55,850
Prior	190,555		140,074
Revolving Loans	32,112		31,536
Total	761,012		724,003
Commercial [Member] \| Commercial Real Estate Nonresidential [Member] \| Watch [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	0		552
2023/2022	548		3,664
2022/2021	3,643		6,305
2022/2020	6,249		2,347
2020/2019	2,298		1,938
Prior	7,637		6,003
Revolving Loans	338		354
Total	20,713		21,163
Commercial [Member] \| Commercial Real Estate Nonresidential [Member] \| OAEM [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	0		2,375
2023/2022	0		15
2022/2021	15		0
2022/2020	0		7,255
2020/2019	7,255		0
Prior	1,459		1,486
Revolving Loans	0		0
Total	8,729		11,131
Commercial [Member] \| Commercial Real Estate Nonresidential [Member] \| Substandard [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	470		2,520
2023/2022	4,341		1,598
2022/2021	1,594		2,538
2022/2020	2,523		4,472
2020/2019	4,480		2,000
Prior	9,966		9,199
Revolving Loans	74		0
Total	23,448		22,327
Commercial [Member] \| Commercial Real Estate Nonresidential [Member] \| Doubtful [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2022/2020	0		0
2020/2019	0		0
Prior	2		13
Revolving Loans	0		0
Total	2		13
Commercial [Member] \| Dealer Floorplans [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2022/2020	0		0
2020/2019	0		0
Prior	0		0
Revolving Loans	77,221		70,308
Total	77,221		70,308
Current Period Gross Charge-Offs [Abstract]
Total	0	0	0
Commercial [Member] \| Dealer Floorplans [Member] \| Pass [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2022/2020	0		0
2020/2019	0		0
Prior	0		0
Revolving Loans	76,789		70,308
Total	76,789		70,308
Commercial [Member] \| Dealer Floorplans [Member] \| Watch [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2022/2020	0		0
2020/2019	0		0
Prior	0		0
Revolving Loans	432		0
Total	432		0
Commercial [Member] \| Dealer Floorplans [Member] \| OAEM [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2022/2020	0		0
2020/2019	0		0
Prior	0		0
Revolving Loans	0		0
Total	0		0
Commercial [Member] \| Dealer Floorplans [Member] \| Substandard [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2022/2020	0		0
2020/2019	0		0
Prior	0		0
Revolving Loans	0		0
Total	0		0
Commercial [Member] \| Dealer Floorplans [Member] \| Doubtful [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2022/2020	0		0
2020/2019	0		0
Prior	0		0
Revolving Loans	0		0
Total	0		0
Commercial [Member] \| Commercial Other [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	27,746		79,203
2023/2022	62,432		52,265
2022/2021	48,559		41,398
2022/2020	39,541		31,049
2020/2019	29,924		5,230
Prior	24,491		23,626
Revolving Loans	88,008		88,311
Total	320,701		321,082
Current Period Gross Charge-Offs [Abstract]
2024/2023	(145)		(725)
2023/2022	0		(710)
2022/2021	(20)		(302)
2021/2020	0		(27)
2020/2019	(2)		(90)
Prior	0		(46)
Revolving loan	0		0
Total	(167)		(1,900)
Commercial [Member] \| Commercial Other [Member] \| Pass [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	25,705		73,115
2023/2022	57,125		47,575
2022/2021	45,270		40,448
2022/2020	38,679		30,033
2020/2019	28,943		4,780
Prior	23,401		22,588
Revolving Loans	80,907		81,791
Total	300,030		300,330
Commercial [Member] \| Commercial Other [Member] \| Watch [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	457		1,138
2023/2022	700		1,109
2022/2021	620		569
2022/2020	291		126
2020/2019	119		239
Prior	837		635
Revolving Loans	6,065		5,877
Total	9,089		9,693
Commercial [Member] \| Commercial Other [Member] \| OAEM [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	0		29
2023/2022	28		0
2022/2021	0		0
2022/2020	0		0
2020/2019	0		0
Prior	0		0
Revolving Loans	30		30
Total	58		59
Commercial [Member] \| Commercial Other [Member] \| Substandard [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	1,584		4,921
2023/2022	4,579		3,581
2022/2021	2,552		381
2022/2020	538		890
2020/2019	862		211
Prior	253		403
Revolving Loans	1,006		613
Total	11,374		11,000
Commercial [Member] \| Commercial Other [Member] \| Doubtful [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	0		0
2023/2022	0		0
2022/2021	117		0
2022/2020	33		0
2020/2019	0		0
Prior	0		0
Revolving Loans	0		0
Total	150		0
Residential [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	35,865		200,442
2023/2022	207,222		162,607
2022/2021	154,555		160,008
2022/2020	156,321		119,964
2020/2019	116,588		57,134
Prior	293,382		245,441
Revolving Loans	143,260		138,964
Total	1,107,193		1,084,560
Current Period Gross Charge-Offs [Abstract]
2024/2023	0		0
2023/2022	0		0
2022/2021	0		(47)
2021/2020	0		0
2020/2019	0		(40)
Prior	(27)		(76)
Revolving loan	0		0
Total	(27)		(163)
Residential [Member] \| Performing [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	35,865		200,442
2023/2022	207,193		162,407
2022/2021	154,086		159,857
2022/2020	156,133		119,772
2020/2019	116,396		56,601
Prior	285,787		238,777
Revolving Loans	142,986		138,663
Total	1,098,446		1,076,519
Residential [Member] \| Nonperforming [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	0		0
2023/2022	29		200
2022/2021	469		151
2022/2020	188		192
2020/2019	192		533
Prior	7,595		6,664
Revolving Loans	274		301
Total	8,747		8,041
Residential [Member] \| Real Estate Mortgage [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	35,865		200,442
2023/2022	207,222		162,607
2022/2021	154,555		160,008
2022/2020	156,321		119,964
2020/2019	116,588		57,134
Prior	285,065		237,369
Revolving Loans	0		0
Total	955,616		937,524
Current Period Gross Charge-Offs [Abstract]
2024/2023	0		0
2023/2022	0		0
2022/2021	0		(47)
2021/2020	0		0
2020/2019	0		(40)
Prior	(27)		(53)
Revolving loan	0		0
Total	(27)		(140)
Residential [Member] \| Real Estate Mortgage [Member] \| Performing [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	35,865		200,442
2023/2022	207,193		162,407
2022/2021	154,086		159,857
2022/2020	156,133		119,772
2020/2019	116,396		56,601
Prior	277,941		231,147
Revolving Loans	0		0
Total	947,614		930,226
Residential [Member] \| Real Estate Mortgage [Member] \| Nonperforming [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	0		0
2023/2022	29		200
2022/2021	469		151
2022/2020	188		192
2020/2019	192		533
Prior	7,124		6,222
Revolving Loans	0		0
Total	8,002		7,298
Residential [Member] \| Home Equity Lines [Member]
Credit Risk Profile, Segregated by Class [Abstract]
2024/2023	0		0
2023/2022	0		0
2022/2021	0		0
2022/2020	0		0
2020/2019	0		0
Prior	8,317		8,072
Revolving Loans	143,260		138,964
Total	151,577		147,036

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- Definition

Refers to the review period considered for loans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

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- References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Amount of writeoff of financing receivable, charged against allowance for credit loss.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-6

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-13

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 11B
-Subparagraph (c)(3)
-SubTopic 10
-Topic 310
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B

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Period Type:	duration

- Definition

Amortized cost of financing receivable originated more than five years prior to current fiscal year. Excludes net investment in lease.

+ References

+ Details

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- Definition

Amortized cost of financing receivable originated four years prior to current fiscal year. Excludes net investment in lease.

+ References

+ Details

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- Definition

Amortized cost of financing receivable originated in current fiscal year. Excludes net investment in lease.

+ References

+ Details

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- Definition

Amortized cost of financing receivable originated in fiscal year prior to current fiscal year. Excludes net investment in lease.

+ References

+ Details

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- Definition

Amount of writeoff of financing receivable originated more than five years before current fiscal year. Excludes net investment in lease.

+ References

+ Details

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- Definition

Amortized cost of financing receivable originated three years prior to current fiscal year. Excludes net investment in lease.

+ References

+ Details

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- Definition

Amortized cost of financing receivable originated two years prior to current fiscal year. Excludes net investment in lease.

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