Loans and Allowance for Credit Losses - Summary of Amortized Cost of CCBX Loans (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2024	Dec. 31, 2023
Financing Receivable, Credit Quality Indicator [Line Items]
Loans receivable	$ 3,418,832	$ 3,026,092
Total CCBX Loans | CCBX Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2024	295,715	263,853
2023, current period gross write-offs	5,548	21,663
2023	160,260	60,918
2022, current period gross write-offs	36,584	45,617
2022	33,490	7,374
2021, current period gross write-offs	13,985	11,589
2021	3,543	109
2020, current period gross write-offs	3,096	100
2020	60	425
2019, current period gross write-offs	24	346
Prior	308	327
Prior, current period gross write-offs	254	217
Revolving Loans Amortized Cost Basis	1,017,202	835,614
Revolving Loans Amortized Cost Basis, current period gross write-offs	107,600	72,401
Revolving Loans Converted To Term	11,161	27,618
Revolving Loans Converted To Term, current period gross write-offs	0	0
Loans receivable	1,521,739	1,196,238
Total, current period gross write-offs	167,091	151,933
Commercial and industrial loans
Financing Receivable, Credit Quality Indicator [Line Items]
2024	7,450	15,882
2023, current period gross write-offs	0	0
2023	12,757	56,428
2022, current period gross write-offs	0	0
2022	44,470	15,566
2021, current period gross write-offs	0	0
2021	13,751	10,155
2020, current period gross write-offs	0	0
2020	8,652	12,429
2019, current period gross write-offs	0	0
Prior	8,202	1,442
Prior, current period gross write-offs	167	46
Revolving Loans Amortized Cost Basis	55,707	36,580
Revolving Loans Amortized Cost Basis, current period gross write-offs	0	0
Revolving Loans Converted To Term	1,172	1,020
Revolving Loans Converted To Term, current period gross write-offs	0	0
Loans receivable	152,161	149,502
Total, current period gross write-offs	167	46
Commercial and industrial loans | Capital call lines | CCBX Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	0
2023, current period gross write-offs	0	0
2023	0	0
2022, current period gross write-offs	0	0
2022	0	0
2021, current period gross write-offs	0	0
2021	0	0
2020, current period gross write-offs	0	0
2020	0	0
2019, current period gross write-offs	0	0
Prior	0	0
Prior, current period gross write-offs	0	0
Revolving Loans Amortized Cost Basis	103,924	87,494
Revolving Loans Amortized Cost Basis, current period gross write-offs	0	0
Revolving Loans Converted To Term	0	0
Revolving Loans Converted To Term, current period gross write-offs	0	0
Loans receivable	103,924	87,494
Total, current period gross write-offs	0	0
Commercial and industrial loans | CCBX Other Commercial and Industrial Loans | CCBX Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	43,600
2023, current period gross write-offs	285	3,848
2023	27,440	7,112
2022, current period gross write-offs	9,446	2,502
2022	4,474	9
2021, current period gross write-offs	1,632	15
2021	5	11
2020, current period gross write-offs	2	16
2020	9	0
2019, current period gross write-offs	0	0
Prior	0	0
Prior, current period gross write-offs	0	0
Revolving Loans Amortized Cost Basis	4,566	3,566
Revolving Loans Amortized Cost Basis, current period gross write-offs	887	224
Revolving Loans Converted To Term	0	0
Revolving Loans Converted To Term, current period gross write-offs	0	0
Loans receivable	36,494	54,298
Total, current period gross write-offs	12,252	6,605
Real Estate Portfolio Segment | Residential real estate loans
Financing Receivable, Credit Quality Indicator [Line Items]
2024	14,746	32,352
2023, current period gross write-offs	0	0
2023	31,201	42,460
2022, current period gross write-offs	0	0
2022	39,369	41,157
2021, current period gross write-offs	0	0
2021	38,310	30,287
2020, current period gross write-offs	0	0
2020	28,744	31,982
2019, current period gross write-offs	0	0
Prior	33,412	22,469
Prior, current period gross write-offs	0	0
Revolving Loans Amortized Cost Basis	26,669	24,496
Revolving Loans Amortized Cost Basis, current period gross write-offs	0	0
Revolving Loans Converted To Term	16	188
Revolving Loans Converted To Term, current period gross write-offs	0	0
Loans receivable	212,467	225,391
Total, current period gross write-offs	0	0
Real Estate Portfolio Segment | Residential real estate loans | CCBX Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	0
2023, current period gross write-offs	0	0
2023	0	0
2022, current period gross write-offs	0	0
2022	0	0
2021, current period gross write-offs	0	0
2021	0	0
2020, current period gross write-offs	0	0
2020	0	0
2019, current period gross write-offs	0	0
Prior	0	0
Prior, current period gross write-offs	0	0
Revolving Loans Amortized Cost Basis	254,294	213,550
Revolving Loans Amortized Cost Basis, current period gross write-offs	3,297	4,641
Revolving Loans Converted To Term	11,108	24,485
Revolving Loans Converted To Term, current period gross write-offs	0	0
Loans receivable	265,402	238,035
Total, current period gross write-offs	3,297	4,641
Consumer and other loans:
Financing Receivable, Credit Quality Indicator [Line Items]
2024	252	323
2023, current period gross write-offs	25	18
2023	57	272
2022, current period gross write-offs	0	0
2022	9,076	5
2021, current period gross write-offs	0	0
2021	3	679
2020, current period gross write-offs	0	0
2020	657	38
2019, current period gross write-offs	0	0
Prior	3,930	164
Prior, current period gross write-offs	0	0
Revolving Loans Amortized Cost Basis	198	147
Revolving Loans Amortized Cost Basis, current period gross write-offs	0	0
Revolving Loans Converted To Term	0	0
Revolving Loans Converted To Term, current period gross write-offs	0	0
Loans receivable	14,173	1,628
Total, current period gross write-offs	25	18
Consumer and other loans: | Credit cards | CCBX Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	0
2023, current period gross write-offs	0	0
2023	0	0
2022, current period gross write-offs	0	0
2022	0	0
2021, current period gross write-offs	0	0
2021	0	0
2020, current period gross write-offs	0	0
2020	0	0
2019, current period gross write-offs	0	0
Prior	0	0
Prior, current period gross write-offs	0	0
Revolving Loans Amortized Cost Basis	633,638	502,704
Revolving Loans Amortized Cost Basis, current period gross write-offs	97,818	61,358
Revolving Loans Converted To Term	53	3,133
Revolving Loans Converted To Term, current period gross write-offs	0	0
Loans receivable	633,691	505,837
Total, current period gross write-offs	97,818	61,358
Consumer and other loans: | Other Consumer and Other Loans | CCBX Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2024	295,715	220,253
2023, current period gross write-offs	5,263	17,815
2023	132,820	53,806
2022, current period gross write-offs	27,138	43,115
2022	29,016	7,365
2021, current period gross write-offs	12,353	11,574
2021	3,538	98
2020, current period gross write-offs	3,094	84
2020	51	425
2019, current period gross write-offs	24	346
Prior	308	327
Prior, current period gross write-offs	254	217
Revolving Loans Amortized Cost Basis	20,780	28,300
Revolving Loans Amortized Cost Basis, current period gross write-offs	5,598	6,178
Revolving Loans Converted To Term	0	0
Revolving Loans Converted To Term, current period gross write-offs	0	0
Loans receivable	482,228	310,574
Total, current period gross write-offs	53,724	79,329
Performing Financial Instruments | Total CCBX Loans | CCBX Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2024	294,373	258,291
2023	156,326	57,567
2022	31,796	6,897
2021	3,287	109
2020	60	418
Prior	261	317
Revolving Loans Amortized Cost Basis	970,896	799,677
Revolving Loans Converted To Term	11,161	26,438
Loans receivable	1,468,160	1,149,714
Performing Financial Instruments | Commercial and industrial loans | Capital call lines | CCBX Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	103,924	87,494
Revolving Loans Converted To Term	0	0
Loans receivable	103,924	87,494
Performing Financial Instruments | Commercial and industrial loans | CCBX Other Commercial and Industrial Loans | CCBX Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	42,267
2023	26,555	6,835
2022	4,288	9
2021	5	11
2020	9	0
Prior	0	0
Revolving Loans Amortized Cost Basis	4,044	3,090
Revolving Loans Converted To Term	0	0
Loans receivable	34,901	52,212
Performing Financial Instruments | Real Estate Portfolio Segment | Residential real estate loans | CCBX Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	251,269	212,435
Revolving Loans Converted To Term	11,108	24,485
Loans receivable	262,377	236,920
Performing Financial Instruments | Consumer and other loans: | Credit cards | CCBX Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	591,089	469,049
Revolving Loans Converted To Term	53	1,953
Loans receivable	591,142	471,002
Performing Financial Instruments | Consumer and other loans: | Other Consumer and Other Loans | CCBX Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2024	294,373	216,024
2023	129,771	50,732
2022	27,508	6,888
2021	3,282	98
2020	51	418
Prior	261	317
Revolving Loans Amortized Cost Basis	20,570	27,609
Revolving Loans Converted To Term	0	0
Loans receivable	475,816	302,086
Nonperforming Financial Instruments | Total CCBX Loans | CCBX Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2024	1,342	5,562
2023	3,934	3,351
2022	1,694	477
2021	256	0
2020	0	7
Prior	47	10
Revolving Loans Amortized Cost Basis	46,306	35,937
Revolving Loans Converted To Term	0	1,180
Loans receivable	53,579	46,524
Nonperforming Financial Instruments | Commercial and industrial loans | Capital call lines | CCBX Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	0	0
Revolving Loans Converted To Term	0	0
Loans receivable	0	0
Nonperforming Financial Instruments | Commercial and industrial loans | CCBX Other Commercial and Industrial Loans | CCBX Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	1,333
2023	885	277
2022	186	0
2021	0	0
2020	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	522	476
Revolving Loans Converted To Term	0	0
Loans receivable	1,593	2,086
Nonperforming Financial Instruments | Real Estate Portfolio Segment | Residential real estate loans | CCBX Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	3,025	1,115
Revolving Loans Converted To Term	0	0
Loans receivable	3,025	1,115
Nonperforming Financial Instruments | Consumer and other loans: | Credit cards | CCBX Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2024	0	0
2023	0	0
2022	0	0
2021	0	0
2020	0	0
Prior	0	0
Revolving Loans Amortized Cost Basis	42,549	33,655
Revolving Loans Converted To Term	0	1,180
Loans receivable	42,549	34,835
Nonperforming Financial Instruments | Consumer and other loans: | Other Consumer and Other Loans | CCBX Loans
Financing Receivable, Credit Quality Indicator [Line Items]
2024	1,342	4,229
2023	3,049	3,074
2022	1,508	477
2021	256	0
2020	0	7
Prior	47	10
Revolving Loans Amortized Cost Basis	210	691
Revolving Loans Converted To Term	0	0
Loans receivable	$ 6,412	$ 8,488