Loans and Allowance for Credit Losses (Allowance for Credit Losses on Financing Receivables) (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
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 58,478	$ 29,014	$ 57,351	$ 16,643	$ 16,643
Merger Adjustments (2)			1,513	1,513
Charge-offs	(1,379)	(1,502)	(2,996)	(1,786)
Recoveries	91	53	257	267
Net (charge-offs) recoveries	(1,288)	(1,449)	(2,739)	(1,519)
Provisions	1,479	27,973	4,057	29,623
Ending Balance	58,669	57,051	58,669	57,051	57,351
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
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance				10,791	10,791
Construction
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	3,471	2,386	3,935	2,973	2,973
Merger Adjustments (2)			3	3
Charge-offs	0	0	(12)	0	0
Recoveries	1	3	7	10
Net (charge-offs) recoveries	1	3	(5)	10
Provisions	(578)	1,439	(1,036)	(377)
Ending Balance	2,894	3,831	2,894	3,831	3,935
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
Construction | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance				1,222	1,222
Residential real estate
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	22,060	9,151	21,949	2,622	2,622
Merger Adjustments (2)			215	215
Charge-offs	0	0	(1)	0	(119)
Recoveries	1	3	5	37
Net (charge-offs) recoveries	1	3	4	37
Provisions	1,468	9,806	1,576	11,327
Ending Balance	23,529	19,175	23,529	19,175	21,949
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
Residential real estate | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance				4,974	4,974
Commercial real estate
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	21,424	10,267	20,975	4,899	4,899
Merger Adjustments (2)			985	985
Charge-offs	0	(1,327)	0	(1,327)	(1,326)
Recoveries	0	0	0	0
Net (charge-offs) recoveries	0	(1,327)	0	(1,327)
Provisions	(147)	12,875	302	14,501
Ending Balance	21,277	22,800	21,277	22,800	20,975
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
Commercial real estate | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance				3,742	3,742
Commercial
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	2,866	1,956	2,671	1,652	1,652
Merger Adjustments (2)			278	278
Charge-offs	(154)	0	(177)	0	(243)
Recoveries	1	2	4	10
Net (charge-offs) recoveries	(153)	2	(173)	10
Provisions	512	2,101	727	1,996
Ending Balance	3,225	4,337	3,225	4,337	2,671
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
Commercial | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance				401	401
Consumer
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	8,145	5,254	7,601	4,497	4,497
Merger Adjustments (2)			14	14
Charge-offs	(1,015)	(115)	(2,401)	(399)	(574)
Recoveries	88	45	232	210
Net (charge-offs) recoveries	(927)	(70)	(2,169)	(189)
Provisions	36	1,658	1,822	2,082
Ending Balance	7,254	6,856	7,254	6,856	7,601
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
Consumer | Consumer Loans, Demand Deposit Overdrafts
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Charge-offs	(156)	(1,500)	(512)	(1,800)
Consumer | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance				452	452
Credit cards
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	512		220	0	0
Merger Adjustments (2)			18	18
Charge-offs	(210)		(405)	(60)	(111)
Recoveries	0		9	0
Net (charge-offs) recoveries	(210)		(396)	(60)
Provisions	188		666	94
Ending Balance	490	$ 52	490	52	220
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
Credit cards | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance				$ 0	$ 0