Loans - Carrying Value of Loan Portfolio by Segment and Credit Quality Indicator (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023	$ 151,584		$ 1,052,208
2023/2022	1,045,651		1,949,053
2022/2021	1,949,513		1,429,940
2021/2020	1,397,309		621,618
2020/2019	598,495		412,644
Prior	1,557,455		1,223,549
Revolving Loans Amortized Cost Basis	845,620		970,839
Revolving Loans Converted to Term	23,425		38,907
Total loans	7,569,052		7,698,758
Gross charge-offs 2024/2023	198		1,225
Gross charge-offs 2023/2022	18		25
Gross charge-offs 2022/2021	3		216
Gross charge-offs 2021/2020	3		2
Gross charge-offs 2020/2019			48
Gross charge-offs Prior	56		59
Gross charge-offs, Total loans	278	$ 325	1,575
Commercial Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023	125,669		762,686
2023/2022	743,915		918,626
2022/2021	909,268		763,835
2021/2020	749,916		304,767
2020/2019	287,222		197,617
Prior	877,023		728,636
Revolving Loans Amortized Cost Basis	675,042		787,727
Revolving Loans Converted to Term	13,725		35,141
Total loans	4,381,780		4,499,035
Gross charge-offs 2023/2022			12
Gross charge-offs 2022/2021			215
Gross charge-offs 2020/2019			47
Gross charge-offs Prior	24		3
Gross charge-offs, Total loans	24		277
Commercial Portfolio Segment [Member] \| Commercial and Industrial [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023	97,469		367,207
2023/2022	355,260		413,432
2022/2021	409,129		307,344
2021/2020	302,134		109,275
2020/2019	99,425		43,642
Prior	144,311		107,741
Revolving Loans Amortized Cost Basis	489,604		583,178
Revolving Loans Converted to Term	12,528		35,090
Total loans	1,909,860		1,966,909
Gross charge-offs 2023/2022			12
Gross charge-offs 2022/2021			215
Gross charge-offs 2020/2019			47
Gross charge-offs Prior	24		3
Gross charge-offs, Total loans	24		277
Commercial Portfolio Segment [Member] \| Commercial and Industrial [Member] \| Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023	96,569		348,103
2023/2022	335,134		396,618
2022/2021	378,386		271,201
2021/2020	269,460		87,234
2020/2019	80,650		41,261
Prior	141,401		106,711
Revolving Loans Amortized Cost Basis	467,602		563,924
Revolving Loans Converted to Term	11,284		31,620
Total loans	1,780,486		1,846,672
Commercial Portfolio Segment [Member] \| Commercial and Industrial [Member] \| Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023	900		4,775
2023/2022	6,390		12,259
2022/2021	27,376		31,895
2021/2020	31,292		20,340
2020/2019	11,208		2,202
Prior	2,335		683
Revolving Loans Amortized Cost Basis	21,194		18,344
Revolving Loans Converted to Term	1,244		3,470
Total loans	101,939		93,968
Commercial Portfolio Segment [Member] \| Commercial and Industrial [Member] \| Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023			13,729
2023/2022	11,703		4,555
2022/2021	3,367		4,248
2021/2020	1,347		1,314
2020/2019	6,950		179
Prior	575		347
Revolving Loans Amortized Cost Basis	808		910
Total loans	24,750		25,282
Commercial Portfolio Segment [Member] \| Commercial and Industrial [Member] \| Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023			600
2023/2022	2,033
2021/2020	35		387
2020/2019	617
Total loans	2,685		987
Commercial Portfolio Segment [Member] \| Municipal Securities [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023	4,593		139,591
2023/2022	144,702		140,626
2022/2021	141,468		246,088
2021/2020	245,572		82,590
2020/2019	81,323		53,460
Prior	411,316		389,867
Revolving Loans Amortized Cost Basis	33,607		31,534
Total loans	1,062,581		1,083,756
Commercial Portfolio Segment [Member] \| Municipal Securities [Member] \| Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023	4,593		139,591
2023/2022	144,702		140,626
2022/2021	141,468		246,088
2021/2020	245,572		82,590
2020/2019	79,289		53,460
Prior	411,316		389,867
Revolving Loans Amortized Cost Basis	33,607		31,534
Total loans	1,060,547		1,083,756
Commercial Portfolio Segment [Member] \| Municipal Securities [Member] \| Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2020/2019	2,034
Total loans	2,034
Commercial Portfolio Segment [Member] \| Owner-Occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023	21,089		238,971
2023/2022	232,241		295,356
2022/2021	285,866		191,012
2021/2020	184,610		97,523
2020/2019	97,300		90,098
Prior	274,528		192,532
Revolving Loans Amortized Cost Basis	13,885		18,281
Revolving Loans Converted to Term	270
Total loans	1,109,789		1,123,773
Commercial Portfolio Segment [Member] \| Owner-Occupied [Member] \| Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023	21,089		236,897
2023/2022	230,577		275,644
2022/2021	262,466		181,472
2021/2020	172,534		97,523
2020/2019	97,300		86,761
Prior	245,581		163,997
Revolving Loans Amortized Cost Basis	13,586		18,281
Revolving Loans Converted to Term	270
Total loans	1,043,403		1,060,575
Commercial Portfolio Segment [Member] \| Owner-Occupied [Member] \| Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023			2,074
2023/2022	1,664		19,191
2022/2021	22,879		7,808
2021/2020	9,698
2020/2019			2,650
Prior	25,858		27,653
Revolving Loans Amortized Cost Basis	299
Total loans	60,398		59,376
Commercial Portfolio Segment [Member] \| Owner-Occupied [Member] \| Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023/2022			515
2022/2021	515		1,732
2021/2020	2,378
2020/2019			687
Prior	2,587		234
Total loans	5,480		3,168
Commercial Portfolio Segment [Member] \| Owner-Occupied [Member] \| Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023/2022			6
2022/2021	6
Prior	502		648
Total loans	508		654
Commercial Portfolio Segment [Member] \| Agriculture [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023	2,518		16,917
2023/2022	11,712		69,212
2022/2021	72,805		19,391
2021/2020	17,600		15,379
2020/2019	9,174		10,417
Prior	46,868		38,496
Revolving Loans Amortized Cost Basis	137,946		154,734
Revolving Loans Converted to Term	927		51
Total loans	299,550		324,597
Commercial Portfolio Segment [Member] \| Agriculture [Member] \| Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023	2,518		16,917
2023/2022	11,712		69,212
2022/2021	72,805		14,159
2021/2020	12,532		15,379
2020/2019	9,174		10,417
Prior	43,007		34,592
Revolving Loans Amortized Cost Basis	133,071		149,125
Revolving Loans Converted to Term	477		51
Total loans	285,296		309,852
Commercial Portfolio Segment [Member] \| Agriculture [Member] \| Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021			4,646
2021/2020	4,482
Prior	3,683		3,724
Revolving Loans Amortized Cost Basis			450
Revolving Loans Converted to Term	450
Total loans	8,615		8,820
Commercial Portfolio Segment [Member] \| Agriculture [Member] \| Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021			586
2021/2020	586
Prior	178		180
Revolving Loans Amortized Cost Basis	1,587		1,786
Total loans	2,351		2,552
Commercial Portfolio Segment [Member] \| Agriculture [Member] \| Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Revolving Loans Amortized Cost Basis	3,288		3,373
Total loans	3,288		3,373
Commercial Portfolio Segment [Member] \| Non Owner-Occupied [Member] \| Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021/2020			280
Prior			3,233
Total loans			3,513
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023	15,009		189,231
2023/2022	197,907		586,402
2022/2021	594,504		345,104
2021/2020	334,383		199,152
2020/2019	196,897		169,141
Prior	462,720		302,749
Revolving Loans Amortized Cost Basis	53,416		62,010
Revolving Loans Converted to Term	5,363		2,961
Total loans	1,860,199		1,856,750
Commercial Real Estate Portfolio Segment [Member] \| Construction Loans [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023	1,860		43,385
2023/2022	61,438		190,826
2022/2021	141,828		59,477
2021/2020	41,016		63,486
2020/2019	66,519		1,006
Revolving Loans Amortized Cost Basis	43,158		47,070
Revolving Loans Converted to Term	745
Total loans	356,564		405,250
Commercial Real Estate Portfolio Segment [Member] \| Construction Loans [Member] \| Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023	1,860		43,385
2023/2022	61,438		190,826
2022/2021	141,828		59,477
2021/2020	41,016		63,486
2020/2019	66,519		1,006
Revolving Loans Amortized Cost Basis	43,158		47,070
Revolving Loans Converted to Term	745
Total loans	356,564		405,250
Commercial Real Estate Portfolio Segment [Member] \| Commercial Acquisition/Development [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023	85		13,228
2023/2022	10,100		40,077
2022/2021	39,909		21,011
2021/2020	20,641		5,992
2020/2019	2,532		597
Prior	9,299		8,814
Revolving Loans Amortized Cost Basis	3,438		7,416
Revolving Loans Converted to Term	4,319		2,961
Total loans	90,323		100,096
Commercial Real Estate Portfolio Segment [Member] \| Commercial Acquisition/Development [Member] \| Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023	85		13,228
2023/2022	10,100		39,000
2022/2021	38,832		21,011
2021/2020	20,641		5,992
2020/2019	2,532		597
Prior	9,299		8,814
Revolving Loans Amortized Cost Basis	3,438		7,416
Revolving Loans Converted to Term	4,319		2,961
Total loans	89,246		99,019
Commercial Real Estate Portfolio Segment [Member] \| Commercial Acquisition/Development [Member] \| Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2023/2022			1,077
2022/2021	1,077
Total loans	1,077		1,077
Commercial Real Estate Portfolio Segment [Member] \| Multifamily [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023	9,033		16,450
2023/2022	16,455		113,936
2022/2021	129,172		92,574
2021/2020	104,263		16,938
2020/2019	16,872		39,371
Prior	70,794		31,671
Revolving Loans Amortized Cost Basis	832		830
Total loans	347,421		311,770
Commercial Real Estate Portfolio Segment [Member] \| Multifamily [Member] \| Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023	9,033		16,450
2023/2022	16,455		113,936
2022/2021	117,430		92,574
2021/2020	104,263		16,938
2020/2019	16,872		39,371
Prior	70,794		31,671
Revolving Loans Amortized Cost Basis	832		830
Total loans	335,679		311,770
Commercial Real Estate Portfolio Segment [Member] \| Multifamily [Member] \| Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	11,742
Total loans	11,742
Commercial Real Estate Portfolio Segment [Member] \| Non Owner-Occupied [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023	4,031		116,168
2023/2022	109,914		241,563
2022/2021	283,595		172,042
2021/2020	168,463		112,736
2020/2019	110,974		128,167
Prior	382,627		262,264
Revolving Loans Amortized Cost Basis	5,988		6,694
Revolving Loans Converted to Term	299
Total loans	1,065,891		1,039,634
Commercial Real Estate Portfolio Segment [Member] \| Non Owner-Occupied [Member] \| Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023	4,031		116,168
2023/2022	109,914		241,563
2022/2021	274,414		172,042
2021/2020	161,436		91,188
2020/2019	90,611		124,291
Prior	353,135		236,694
Revolving Loans Amortized Cost Basis	5,988		6,694
Revolving Loans Converted to Term	299
Total loans	999,828		988,640
Commercial Real Estate Portfolio Segment [Member] \| Non Owner-Occupied [Member] \| Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	9,181
2021/2020	1,820		21,268
2020/2019	20,363		3,876
Prior	6,246		2,489
Total loans	37,610		27,633
Commercial Real Estate Portfolio Segment [Member] \| Non Owner-Occupied [Member] \| Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2021/2020	5,207
Prior	20,013		19,848
Total loans	25,220		19,848
Commercial Real Estate Portfolio Segment [Member] \| Non Owner-Occupied [Member] \| Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	3,233
Total loans	3,233
Residential Portfolio Segment [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023	9,930		94,346
2023/2022	98,594		440,695
2022/2021	443,229		318,768
2021/2020	311,120		116,702
2020/2019	113,541		45,642
Prior	217,225		191,704
Revolving Loans Amortized Cost Basis	112,275		115,152
Revolving Loans Converted to Term	4,290		778
Total loans	1,310,204		1,323,787
Residential Portfolio Segment [Member] \| Sr lien [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023	9,135		89,163
2023/2022	92,678		436,082
2022/2021	438,716		316,820
2021/2020	309,116		112,997
2020/2019	111,127		43,372
Prior	210,005		186,609
Revolving Loans Amortized Cost Basis	48,761		48,462
Revolving Loans Converted to Term	107		94
Total loans	1,219,645		1,233,599
Gross charge-offs Prior			48
Gross charge-offs, Total loans			48
Residential Portfolio Segment [Member] \| Sr lien [Member] \| Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023	9,135		87,608
2023/2022	91,141		434,963
2022/2021	436,360		316,080
2021/2020	308,130		112,582
2020/2019	110,679		42,752
Prior	206,637		183,890
Revolving Loans Amortized Cost Basis	48,761		48,462
Revolving Loans Converted to Term	107		94
Total loans	1,210,950		1,226,431
Residential Portfolio Segment [Member] \| Sr lien [Member] \| Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	745
Prior	505		515
Total loans	1,250		515
Residential Portfolio Segment [Member] \| Sr lien [Member] \| Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023			1,555
2023/2022	1,537		1,119
2022/2021	1,582		740
2021/2020	986		415
2020/2019	415		620
Prior	2,863		2,167
Total loans	7,383		6,616
Residential Portfolio Segment [Member] \| Sr lien [Member] \| Doubtful [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2022/2021	29
2020/2019	33
Prior			37
Total loans	62		37
Residential Portfolio Segment [Member] \| Jr Lien 1-4 Family Closed End [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023	795		5,183
2023/2022	5,916		4,613
2022/2021	4,513		1,948
2021/2020	2,004		3,705
2020/2019	2,414		2,270
Prior	7,220		5,095
Revolving Loans Amortized Cost Basis	63,514		66,690
Revolving Loans Converted to Term	4,183		684
Total loans	90,559		90,188
Gross charge-offs Prior			48
Gross charge-offs, Total loans			48
Residential Portfolio Segment [Member] \| Jr Lien 1-4 Family Closed End [Member] \| Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023	795		4,920
2023/2022	5,916		4,464
2022/2021	4,367		1,712
2021/2020	1,768		2,947
2020/2019	2,117		2,270
Prior	6,871		4,729
Revolving Loans Amortized Cost Basis	63,514		66,441
Revolving Loans Converted to Term	4,183		684
Total loans	89,531		88,167
Residential Portfolio Segment [Member] \| Jr Lien 1-4 Family Closed End [Member] \| Special Mention [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	27		27
Revolving Loans Amortized Cost Basis			249
Total loans	27		276
Residential Portfolio Segment [Member] \| Jr Lien 1-4 Family Closed End [Member] \| Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023			263
2023/2022			149
2022/2021	146		236
2021/2020	236		758
2020/2019	297
Prior	322		339
Total loans	1,001		1,745
Consumer Loan [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023	976		5,945
2023/2022	5,235		3,330
2022/2021	2,512		2,233
2021/2020	1,890		997
2020/2019	835		244
Prior	487		460
Revolving Loans Amortized Cost Basis	4,887		5,950
Revolving Loans Converted to Term	47		27
Total loans	16,869		19,186
Gross charge-offs 2024/2023	198		1,225
Gross charge-offs 2023/2022	18		13
Gross charge-offs 2022/2021	3		1
Gross charge-offs 2021/2020	3		2
Gross charge-offs 2020/2019			1
Gross charge-offs Prior	32		8
Gross charge-offs, Total loans	254	$ 325	1,250
Consumer Loan [Member] \| Pass [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
2024/2023	976		5,945
2023/2022	5,235		3,330
2022/2021	2,512		2,233
2021/2020	1,890		997
2020/2019	835		244
Prior	440		410
Revolving Loans Amortized Cost Basis	4,884		5,947
Revolving Loans Converted to Term	47		27
Total loans	16,819		19,133
Consumer Loan [Member] \| Substandard [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	47		50
Revolving Loans Amortized Cost Basis	3		3
Total loans	$ 50		$ 53

Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease.

Reference 1: 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 2: 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

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- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479344/326-20-45-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-3B

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-5

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- Definition

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

+ 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 3B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-3B

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

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