Allowance for Credit Losses and Credit Quality of Loans, Credit Quality Indicators (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Minimum number of days past due for loans to be considered nonperforming			90 days
Credit Quality by Loan Class by Vintage [Abstract]
2024/2023	$ 801,104		$ 801,104	$ 1,444,621
2023/2022	1,364,956		1,364,956	1,989,711
2022/2021	1,817,999		1,817,999	1,688,309
2021/2020	1,537,785		1,537,785	1,019,863
2020/2019	946,156		946,156	692,961
Prior	2,320,798		2,320,798	1,840,266
Revolving Loans Amortized Cost Basis	977,043		977,043	920,868
Revolving Loans Converted to Term	88,506		88,506	54,114
Total	9,854,347		9,854,347	9,650,713
Gross Charge-offs by Loan Class by Vintage [Abstract]
2024/2023			(212)	(1,161)
2023/2022			(1,062)	(9,878)
2022/2021			(5,247)	(9,586)
2021/2020			(3,503)	(1,830)
2020/2019			(643)	(1,805)
Prior			(1,640)	(2,518)
Revolving Loans Amortized Cost Basis			0	0
Revolving Loans Converted to Term			0	0
Total	(5,627)	$ (5,149)	(12,307)	(26,778)
C&I [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2024/2023	150,734		150,734	231,165
2023/2022	208,080		208,080	274,930
2022/2021	227,388		227,388	243,881
2021/2020	209,249		209,249	161,857
2020/2019	141,246		141,246	76,826
Prior	123,476		123,476	71,313
Revolving Loans Amortized Cost Basis	384,152		384,152	333,003
Revolving Loans Converted to Term	14,354		14,354	4,530
Total	1,458,679		1,458,679	1,397,505
Gross Charge-offs by Loan Class by Vintage [Abstract]
2024/2023			0	(24)
2023/2022			(58)	(3,021)
2022/2021			(915)	(5)
2021/2020			(4)	(86)
2020/2019			0	0
Prior			(307)	(600)
Revolving Loans Amortized Cost Basis			0	0
Revolving Loans Converted to Term			0	0
Total			(1,284)	(3,736)
C&I [Member] | Pass [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2024/2023	149,845		149,845	229,249
2023/2022	199,272		199,272	270,796
2022/2021	219,561		219,561	241,993
2021/2020	207,165		207,165	158,051
2020/2019	136,993		136,993	74,469
Prior	115,577		115,577	63,826
Revolving Loans Amortized Cost Basis	338,577		338,577	299,248
Revolving Loans Converted to Term	13,847		13,847	2,923
Total	1,380,837		1,380,837	1,340,555
C&I [Member] | Special Mention [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2024/2023	557		557	420
2023/2022	4,909		4,909	1,672
2022/2021	5,531		5,531	277
2021/2020	434		434	3,524
2020/2019	4,003		4,003	87
Prior	1,892		1,892	1,854
Revolving Loans Amortized Cost Basis	25,194		25,194	19,489
Revolving Loans Converted to Term	370		370	0
Total	42,890		42,890	27,323
C&I [Member] | Substandard [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2024/2023	332		332	1,496
2023/2022	3,800		3,800	2,461
2022/2021	2,295		2,295	1,609
2021/2020	1,631		1,631	282
2020/2019	250		250	2,266
Prior	5,997		5,997	5,632
Revolving Loans Amortized Cost Basis	20,381		20,381	14,266
Revolving Loans Converted to Term	137		137	1,607
Total	34,823		34,823	29,619
C&I [Member] | Doubtful [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2024/2023	0		0	0
2023/2022	99		99	1
2022/2021	1		1	2
2021/2020	19		19	0
2020/2019	0		0	4
Prior	10		10	1
Revolving Loans Amortized Cost Basis	0		0	0
Revolving Loans Converted to Term	0		0	0
Total	129		129	8
CRE [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2024/2023	232,839		232,839	357,108
2023/2022	370,404		370,404	523,404
2022/2021	521,845		521,845	594,415
2021/2020	549,632		549,632	460,311
2020/2019	439,555		439,555	340,767
Prior	1,067,972		1,067,972	816,067
Revolving Loans Amortized Cost Basis	317,096		317,096	307,971
Revolving Loans Converted to Term	54,559		54,559	33,705
Total	3,553,902		3,553,902	3,433,748
Gross Charge-offs by Loan Class by Vintage [Abstract]
2024/2023			0	0
2023/2022			0	0
2022/2021			0	0
2021/2020			0	0
2020/2019			0	(114)
Prior			0	(304)
Revolving Loans Amortized Cost Basis			0	0
Revolving Loans Converted to Term			0	0
Total			0	(418)
CRE [Member] | Pass [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2024/2023	231,892		231,892	353,161
2023/2022	358,866		358,866	518,201
2022/2021	492,938		492,938	561,897
2021/2020	523,952		523,952	452,110
2020/2019	432,230		432,230	327,804
Prior	975,497		975,497	739,189
Revolving Loans Amortized Cost Basis	311,534		311,534	294,039
Revolving Loans Converted to Term	54,559		54,559	33,705
Total	3,381,468		3,381,468	3,280,106
CRE [Member] | Special Mention [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2024/2023	947		947	3,577
2023/2022	9,375		9,375	4,472
2022/2021	10,017		10,017	10,711
2021/2020	7,754		7,754	7,055
2020/2019	4,035		4,035	9,967
Prior	31,354		31,354	39,460
Revolving Loans Amortized Cost Basis	4,288		4,288	2,970
Revolving Loans Converted to Term	0		0	0
Total	67,770		67,770	78,212
CRE [Member] | Substandard [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2024/2023	0		0	370
2023/2022	2,163		2,163	731
2022/2021	18,890		18,890	21,807
2021/2020	17,926		17,926	1,146
2020/2019	3,290		3,290	2,996
Prior	61,121		61,121	37,418
Revolving Loans Amortized Cost Basis	1,274		1,274	10,962
Revolving Loans Converted to Term	0		0	0
Total	104,664		104,664	75,430
Auto [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2024/2023	318,428		318,428	474,901
2023/2022	393,476		393,476	364,757
2022/2021	300,196		300,196	158,081
2021/2020	121,213		121,213	42,834
2020/2019	29,947		29,947	45,712
Prior	31,002		31,002	13,145
Revolving Loans Amortized Cost Basis	0		0	12
Revolving Loans Converted to Term	0		0	0
Total	1,194,262		1,194,262	1,099,442
Gross Charge-offs by Loan Class by Vintage [Abstract]
2024/2023			(21)	(102)
2023/2022			(591)	(1,183)
2022/2021			(913)	(1,066)
2021/2020			(499)	(340)
2020/2019			(35)	(301)
Prior			(225)	(295)
Revolving Loans Amortized Cost Basis			0	0
Revolving Loans Converted to Term			0	0
Total			(2,284)	(3,287)
Auto [Member] | Performing [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2024/2023	318,277		318,277	474,369
2023/2022	392,472		392,472	363,516
2022/2021	299,349		299,349	157,251
2021/2020	120,481		120,481	42,644
2020/2019	29,789		29,789	45,406
Prior	30,820		30,820	13,071
Revolving Loans Amortized Cost Basis	0		0	12
Revolving Loans Converted to Term	0		0	0
Total	1,191,188		1,191,188	1,096,269
Auto [Member] | Nonperforming [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2024/2023	151		151	532
2023/2022	1,004		1,004	1,241
2022/2021	847		847	830
2021/2020	732		732	190
2020/2019	158		158	306
Prior	182		182	74
Revolving Loans Amortized Cost Basis	0		0	0
Revolving Loans Converted to Term	0		0	0
Total	3,074		3,074	3,173
Residential Solar [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2024/2023	1,803		1,803	155,425
2023/2022	132,372		132,372	431,692
2022/2021	413,902		413,902	179,044
2021/2020	173,446		173,446	65,400
2020/2019	61,393		61,393	46,601
Prior	78,967		78,967	39,593
Revolving Loans Amortized Cost Basis	0		0	0
Revolving Loans Converted to Term	0		0	0
Total	861,883		861,883	917,755
Gross Charge-offs by Loan Class by Vintage [Abstract]
2024/2023			0	(150)
2023/2022			(143)	(1,930)
2022/2021			(2,036)	(923)
2021/2020			(251)	(45)
2020/2019			(34)	(558)
Prior			(492)	(345)
Revolving Loans Amortized Cost Basis			0	0
Revolving Loans Converted to Term			0	0
Total			(2,956)	(3,951)
Residential Solar [Member] | Performing [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2024/2023	1,803		1,803	155,425
2023/2022	132,249		132,249	430,855
2022/2021	413,160		413,160	178,839
2021/2020	173,286		173,286	65,382
2020/2019	61,333		61,333	46,554
Prior	78,887		78,887	39,540
Revolving Loans Amortized Cost Basis	0		0	0
Revolving Loans Converted to Term	0		0	0
Total	860,718		860,718	916,595
Residential Solar [Member] | Nonperforming [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2024/2023	0		0	0
2023/2022	123		123	837
2022/2021	742		742	205
2021/2020	160		160	18
2020/2019	60		60	47
Prior	80		80	53
Revolving Loans Amortized Cost Basis	0		0	0
Revolving Loans Converted to Term	0		0	0
Total	1,165		1,165	1,160
Other Consumer [Member]
Financing Receivable, Credit Quality Indicator [Line Items]
Overdrawn deposit related to gross charge-offs reported as 2022 originations				200
Overdrawn deposit related to gross charge-offs reported as 2023 originations			200	800
Overdrawn deposit related to gross charge-offs reported as 2024 originations			200
Credit Quality by Loan Class by Vintage [Abstract]
2024/2023	10,904		10,904	13,089
2023/2022	9,032		9,032	27,638
2022/2021	18,791		18,791	58,561
2021/2020	39,865		39,865	21,231
2020/2019	15,431		15,431	14,604
Prior	22,040		22,040	16,125
Revolving Loans Amortized Cost Basis	22,057		22,057	19,046
Revolving Loans Converted to Term	11		11	66
Total	138,131		138,131	170,360
Gross Charge-offs by Loan Class by Vintage [Abstract]
2024/2023			(191)	(885)
2023/2022			(270)	(3,744)
2022/2021			(1,383)	(7,511)
2021/2020			(2,749)	(1,329)
2020/2019			(574)	(832)
Prior			(502)	(568)
Revolving Loans Amortized Cost Basis			0	0
Revolving Loans Converted to Term			0	0
Total			(5,669)	(14,869)
Other Consumer [Member] | Performing [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2024/2023	10,904		10,904	13,089
2023/2022	9,020		9,020	27,394
2022/2021	18,664		18,664	57,876
2021/2020	39,443		39,443	21,087
2020/2019	15,264		15,264	14,548
Prior	21,743		21,743	15,964
Revolving Loans Amortized Cost Basis	22,044		22,044	19,042
Revolving Loans Converted to Term	3		3	21
Total	137,085		137,085	169,021
Other Consumer [Member] | Nonperforming [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2024/2023	0		0	0
2023/2022	12		12	244
2022/2021	127		127	685
2021/2020	422		422	144
2020/2019	167		167	56
Prior	297		297	161
Revolving Loans Amortized Cost Basis	13		13	4
Revolving Loans Converted to Term	8		8	45
Total	1,046		1,046	1,339
Residential [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2024/2023	86,396		86,396	212,933
2023/2022	251,592		251,592	367,290
2022/2021	335,877		335,877	454,327
2021/2020	444,380		444,380	268,230
2020/2019	258,584		258,584	168,451
Prior	997,341		997,341	884,023
Revolving Loans Amortized Cost Basis	253,738		253,738	260,836
Revolving Loans Converted to Term	19,582		19,582	15,813
Total	2,647,490		2,647,490	2,631,903
Gross Charge-offs by Loan Class by Vintage [Abstract]
2024/2023			0	0
2023/2022			0	0
2022/2021			0	(81)
2021/2020			0	(30)
2020/2019			0	0
Prior			(114)	(406)
Revolving Loans Amortized Cost Basis			0	0
Revolving Loans Converted to Term			0	0
Total	0	$ (105)	(114)	(517)
Residential [Member] | Performing [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2024/2023	86,396		86,396	212,799
2023/2022	250,760		250,760	366,860
2022/2021	335,011		335,011	453,206
2021/2020	442,457		442,457	267,845
2020/2019	258,291		258,291	167,860
Prior	989,436		989,436	876,563
Revolving Loans Amortized Cost Basis	253,709		253,709	260,836
Revolving Loans Converted to Term	19,582		19,582	15,300
Total	2,635,642		2,635,642	2,621,269
Residential [Member] | Nonperforming [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2024/2023	0		0	134
2023/2022	832		832	430
2022/2021	866		866	1,121
2021/2020	1,923		1,923	385
2020/2019	293		293	591
Prior	7,905		7,905	7,460
Revolving Loans Amortized Cost Basis	29		29	0
Revolving Loans Converted to Term	0		0	513
Total	$ 11,848		$ 11,848	$ 10,634