Allowance for Credit Losses and Credit Quality of Loans, Credit Quality Indicators (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Credit Quality Indicators [Abstract]
Minimum number of days past due for loans to be considered nonperforming	90 days
Credit Quality by Loan Class by Vintage [Abstract]
2023/2022	$ 1,444,621	$ 1,952,599
2022/2021	1,989,711	1,615,395
2021/2020	1,688,309	1,012,149
2020/2019	1,019,863	774,792
2019/2018	692,961	518,993
Prior	1,840,266	1,414,638
Revolving Loans Amortized Cost Basis	920,868	800,156
Revolving Loans Converted to Term	54,114	61,425
Total	9,650,713	8,150,147
Gross Charge-offs by Loan Class by Vintage [Abstract]
2023	(1,161)
2022	(9,878)
2021	(9,586)
2020	(1,830)
2019	(1,805)
Prior	(2,518)
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	(26,778)	(18,643)	$ (20,106)
C&I [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2023/2022	231,165	297,682
2022/2021	274,930	253,483
2021/2020	243,881	169,738
2020/2019	161,857	94,817
2019/2018	76,826	40,593
Prior	71,313	36,800
Revolving Loans Amortized Cost Basis	333,003	344,748
Revolving Loans Converted to Term	4,530	3,296
Total	1,397,505	1,241,157
Gross Charge-offs by Loan Class by Vintage [Abstract]
2023	(24)
2022	(3,021)
2021	(5)
2020	(86)
2019	0
Prior	(600)
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	(3,736)
C&I [Member] | Pass [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2023/2022	229,249	296,562
2022/2021	270,796	252,480
2021/2020	241,993	164,976
2020/2019	158,051	91,497
2019/2018	74,469	39,394
Prior	63,826	32,413
Revolving Loans Amortized Cost Basis	299,248	327,166
Revolving Loans Converted to Term	2,923	3,133
Total	1,340,555	1,207,621
C&I [Member] | Special Mention [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2023/2022	420	1,044
2022/2021	1,672	524
2021/2020	277	4,531
2020/2019	3,524	194
2019/2018	87	1,108
Prior	1,854	417
Revolving Loans Amortized Cost Basis	19,489	5,234
Revolving Loans Converted to Term	0	0
Total	27,323	13,052
C&I [Member] | Substandard [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2023/2022	1,496	76
2022/2021	2,461	459
2021/2020	1,609	231
2020/2019	282	3,098
2019/2018	2,266	91
Prior	5,632	3,969
Revolving Loans Amortized Cost Basis	14,266	12,348
Revolving Loans Converted to Term	1,607	163
Total	29,619	20,435
C&I [Member] | Doubtful [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2023/2022	0	0
2022/2021	1	20
2021/2020	2	0
2020/2019	0	28
2019/2018	4	0
Prior	1	1
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	8	49
CRE [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2023/2022	357,108	375,227
2022/2021	523,404	466,754
2021/2020	594,415	442,196
2020/2019	460,311	340,146
2019/2018	340,767	223,612
Prior	816,067	614,625
Revolving Loans Amortized Cost Basis	307,971	203,126
Revolving Loans Converted to Term	33,705	29,722
Total	3,433,748	2,695,408
Gross Charge-offs by Loan Class by Vintage [Abstract]
2023	0
2022	0
2021	0
2020	0
2019	(114)
Prior	(304)
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	(418)
CRE [Member] | Pass [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2023/2022	353,161	374,313
2022/2021	518,201	465,990
2021/2020	561,897	439,012
2020/2019	452,110	333,568
2019/2018	327,804	217,141
Prior	739,189	566,783
Revolving Loans Amortized Cost Basis	294,039	201,563
Revolving Loans Converted to Term	33,705	24,735
Total	3,280,106	2,623,105
CRE [Member] | Special Mention [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2023/2022	3,577	605
2022/2021	4,472	764
2021/2020	10,711	868
2020/2019	7,055	2,641
2019/2018	9,967	4,649
Prior	39,460	24,023
Revolving Loans Amortized Cost Basis	2,970	850
Revolving Loans Converted to Term	0	0
Total	78,212	34,400
CRE [Member] | Substandard [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2023/2022	370	309
2022/2021	731	0
2021/2020	21,807	2,316
2020/2019	1,146	3,937
2019/2018	2,996	1,822
Prior	37,418	23,819
Revolving Loans Amortized Cost Basis	10,962	713
Revolving Loans Converted to Term	0	4,987
Total	75,430	37,903
Auto [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2023/2022	474,901	489,366
2022/2021	364,757	239,745
2021/2020	158,081	76,257
2020/2019	42,834	100,000
2019/2018	45,712	44,277
Prior	13,145	13,056
Revolving Loans Amortized Cost Basis	12	0
Revolving Loans Converted to Term	0	0
Total	1,099,442	962,701
Gross Charge-offs by Loan Class by Vintage [Abstract]
2023	(102)
2022	(1,183)
2021	(1,066)
2020	(340)
2019	(301)
Prior	(295)
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	(3,287)
Auto [Member] | Performing [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2023/2022	474,369	488,776
2022/2021	363,516	239,090
2021/2020	157,251	75,853
2020/2019	42,644	99,615
2019/2018	45,406	44,061
Prior	13,071	13,027
Revolving Loans Amortized Cost Basis	12	0
Revolving Loans Converted to Term	0	0
Total	1,096,269	960,422
Auto [Member] | Nonperforming [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2023/2022	532	590
2022/2021	1,241	655
2021/2020	830	404
2020/2019	190	385
2019/2018	306	216
Prior	74	29
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	3,173	2,279
Residential Solar [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2023/2022	155,425	486,262
2022/2021	431,692	194,069
2021/2020	179,044	74,582
2020/2019	65,400	54,687
2019/2018	46,601	36,135
Prior	39,593	11,063
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	917,755	856,798
Gross Charge-offs by Loan Class by Vintage [Abstract]
2023	(150)
2022	(1,930)
2021	(923)
2020	(45)
2019	(558)
Prior	(345)
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	(3,951)
Residential Solar [Member] | Performing [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2023/2022	155,425	485,942
2022/2021	430,855	193,971
2021/2020	178,839	74,532
2020/2019	65,382	54,662
2019/2018	46,554	36,119
Prior	39,540	11,019
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	916,595	856,245
Residential Solar [Member] | Nonperforming [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2023/2022	0	320
2022/2021	837	98
2021/2020	205	50
2020/2019	18	25
2019/2018	47	16
Prior	53	44
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	0	0
Total	1,160	553
Other Consumer [Member]
Credit Quality Indicators [Abstract]
Overdrawn deposit related to gross charge-offs reported as 2022 originations	200
Overdrawn deposit related to gross charge-offs reported as 2023 originations	800
Credit Quality by Loan Class by Vintage [Abstract]
2023/2022	13,089	52,783
2022/2021	27,638	111,462
2021/2020	58,561	36,807
2020/2019	21,231	27,630
2019/2018	14,604	15,593
Prior	16,125	15,822
Revolving Loans Amortized Cost Basis	19,046	19,226
Revolving Loans Converted to Term	66	265
Total	170,360	279,588
Gross Charge-offs by Loan Class by Vintage [Abstract]
2023	(885)
2022	(3,744)
2021	(7,511)
2020	(1,329)
2019	(832)
Prior	(568)
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	(14,869)
Other Consumer [Member] | Performing [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2023/2022	13,089	52,545
2022/2021	27,394	110,624
2021/2020	57,876	36,412
2020/2019	21,087	27,383
2019/2018	14,548	15,536
Prior	15,964	15,735
Revolving Loans Amortized Cost Basis	19,042	19,218
Revolving Loans Converted to Term	21	250
Total	169,021	277,703
Other Consumer [Member] | Nonperforming [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2023/2022	0	238
2022/2021	244	838
2021/2020	685	395
2020/2019	144	247
2019/2018	56	57
Prior	161	87
Revolving Loans Amortized Cost Basis	4	8
Revolving Loans Converted to Term	45	15
Total	1,339	1,885
Residential [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2023/2022	212,933	251,279
2022/2021	367,290	349,882
2021/2020	454,327	212,569
2020/2019	268,230	157,512
2019/2018	168,451	158,783
Prior	884,023	723,272
Revolving Loans Amortized Cost Basis	260,836	233,056
Revolving Loans Converted to Term	15,813	28,142
Total	2,631,903	2,114,495
Gross Charge-offs by Loan Class by Vintage [Abstract]
2023	0
2022	0
2021	(81)
2020	(30)
2019	0
Prior	(406)
Revolving Loans Amortized Cost Basis	0
Revolving Loans Converted to Term	0
Total	(517)	(633)	$ (979)
Residential [Member] | Performing [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2023/2022	212,799	251,012
2022/2021	366,860	349,498
2021/2020	453,206	212,161
2020/2019	267,845	156,957
2019/2018	167,860	157,755
Prior	876,563	717,621
Revolving Loans Amortized Cost Basis	260,836	233,056
Revolving Loans Converted to Term	15,300	28,122
Total	2,621,269	2,106,182
Residential [Member] | Nonperforming [Member]
Credit Quality by Loan Class by Vintage [Abstract]
2023/2022	134	267
2022/2021	430	384
2021/2020	1,121	408
2020/2019	385	555
2019/2018	591	1,028
Prior	7,460	5,651
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted to Term	513	20
Total	$ 10,634	$ 8,313