Loans and Allowance for Credit Losses (Aging of Past Due Financing Receivables) (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Loans held for investment	$ 4,733,909	$ 4,641,010
Percent of total loans, total loans	100.00%	100.00%
Loans, at fair value	$ 10,023	$ 9,944
Current
Financing Receivable, Past Due [Line Items]
Loans held for investment	4,709,648	4,618,128
Non-Accrual Current Loans	$ 6,390	$ 6,280
Percent of total loans, accrual	0.9949	0.9950
Percent of total loans, nonaccrual	0.13%	0.14%
Total past due
Financing Receivable, Past Due [Line Items]
Loans held for investment	$ 17,871	$ 16,602
Percent of total loans, total past due	0.38%	0.36%
30‑59 days past due
Financing Receivable, Past Due [Line Items]
Loans held for investment	$ 3,136	$ 7,662
Percent of total loans, total past due	0.07%	0.17%
60‑89 days past due
Financing Receivable, Past Due [Line Items]
Loans held for investment	$ 5,827	$ 1,698
Percent of total loans, total past due	0.12%	0.04%
90 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Loans held for investment	$ 454	$ 738
Percent of total loans, total past due	0.01%	0.02%
30-89 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans held for investment	$ 5,085	$ 1,493
Percent of total loans, total past due	0.11%	0.03%
90 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans held for investment	$ 3,369	$ 5,011
Percent of total loans, total past due	0.07%	0.11%
Construction
Financing Receivable, Past Due [Line Items]
Loans held for investment	$ 337,113	$ 299,000
Construction | Current
Financing Receivable, Past Due [Line Items]
Loans held for investment	336,496	296,455
Non-Accrual Current Loans	0	405
Construction | Total past due
Financing Receivable, Past Due [Line Items]
Loans held for investment	617	2,140
Construction | 30‑59 days past due
Financing Receivable, Past Due [Line Items]
Loans held for investment	410	1,919
Construction | 60‑89 days past due
Financing Receivable, Past Due [Line Items]
Loans held for investment	0	0
Construction | 90 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Loans held for investment	0	0
Construction | 30-89 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans held for investment	0	0
Construction | 90 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans held for investment	207	221
Residential real estate
Financing Receivable, Past Due [Line Items]
Loans held for investment	1,570,998	1,490,438
Residential real estate | Current
Financing Receivable, Past Due [Line Items]
Loans held for investment	1,562,510	1,481,294
Non-Accrual Current Loans	2,422	2,208
Residential real estate | Total past due
Financing Receivable, Past Due [Line Items]
Loans held for investment	6,066	6,936
Residential real estate | 30‑59 days past due
Financing Receivable, Past Due [Line Items]
Loans held for investment	956	2,420
Residential real estate | 60‑89 days past due
Financing Receivable, Past Due [Line Items]
Loans held for investment	389	271
Residential real estate | 90 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Loans held for investment	205	108
Residential real estate | 30-89 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans held for investment	2,377	1,469
Residential real estate | 90 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans held for investment	2,139	2,668
Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans held for investment	2,276,381	2,286,154
Commercial real estate | Current
Financing Receivable, Past Due [Line Items]
Loans held for investment	2,266,157	2,281,774
Non-Accrual Current Loans	2,876	3,149
Commercial real estate | Total past due
Financing Receivable, Past Due [Line Items]
Loans held for investment	7,348	1,231
Commercial real estate | 30‑59 days past due
Financing Receivable, Past Due [Line Items]
Loans held for investment	95	16
Commercial real estate | 60‑89 days past due
Financing Receivable, Past Due [Line Items]
Loans held for investment	4,443	0
Commercial real estate | 90 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Loans held for investment	0	0
Commercial real estate | 30-89 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans held for investment	2,239	0
Commercial real estate | 90 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans held for investment	571	1,215
Commercial
Financing Receivable, Past Due [Line Items]
Loans held for investment	225,083	229,939
Commercial | Current
Financing Receivable, Past Due [Line Items]
Loans held for investment	223,944	228,859
Non-Accrual Current Loans	1,018	516
Commercial | Total past due
Financing Receivable, Past Due [Line Items]
Loans held for investment	121	564
Commercial | 30‑59 days past due
Financing Receivable, Past Due [Line Items]
Loans held for investment	56	48
Commercial | 60‑89 days past due
Financing Receivable, Past Due [Line Items]
Loans held for investment	1	0
Commercial | 90 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Loans held for investment	6	488
Commercial | 30-89 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans held for investment	0	0
Commercial | 90 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans held for investment	58	28
Consumer
Financing Receivable, Past Due [Line Items]
Loans held for investment	317,149	328,896
Consumer | Current
Financing Receivable, Past Due [Line Items]
Loans held for investment	313,928	323,376
Non-Accrual Current Loans	51	2
Consumer | Total past due
Financing Receivable, Past Due [Line Items]
Loans held for investment	3,170	5,518
Consumer | 30‑59 days past due
Financing Receivable, Past Due [Line Items]
Loans held for investment	1,558	3,224
Consumer | 60‑89 days past due
Financing Receivable, Past Due [Line Items]
Loans held for investment	896	1,391
Consumer | 90 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Loans held for investment	9	0
Consumer | 30-89 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans held for investment	439	24
Consumer | 90 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans held for investment	268	879
Credit cards
Financing Receivable, Past Due [Line Items]
Loans held for investment	7,185	6,583
Credit cards | Current
Financing Receivable, Past Due [Line Items]
Loans held for investment	6,613	6,370
Non-Accrual Current Loans	23	0
Credit cards | Total past due
Financing Receivable, Past Due [Line Items]
Loans held for investment	549	213
Credit cards | 30‑59 days past due
Financing Receivable, Past Due [Line Items]
Loans held for investment	61	35
Credit cards | 60‑89 days past due
Financing Receivable, Past Due [Line Items]
Loans held for investment	98	36
Credit cards | 90 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Loans held for investment	234	142
Credit cards | 30-89 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans held for investment	30	0
Credit cards | 90 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans held for investment	$ 126	$ 0