Loans and Allowance for Credit Losses (Aging of Past Due Financing Receivables) (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Loans	$ 4,648,725	$ 4,641,010
Percent of total loans, total loans	100.00%	100.00%
Loans, at fair value	$ 9,684	$ 9,944
Current
Financing Receivable, Past Due [Line Items]
Loans	4,626,050	4,618,122
Non-accrual Current Loans	$ 6,939	$ 6,280
Percent of total loans, accrual	0.9951	0.9950
Percent of total loans, nonaccrual	0.15%	0.13%
Total past due
Financing Receivable, Past Due [Line Items]
Loans	$ 15,736	$ 16,608
Percent of total loans, total past due	0.34%	0.37%
30‑59 days past due
Financing Receivable, Past Due [Line Items]
Loans	$ 7,758	$ 7,662
Percent of total loans, total past due	0.17%	0.17%
60‑89 days past due
Financing Receivable, Past Due [Line Items]
Loans	$ 581	$ 1,698
Percent of total loans, total past due	0.01%	0.04%
30-89 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans	$ 747	$ 1,493
Percent of total loans, total past due	0.02%	0.03%
90 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Loans	$ 1,560	$ 738
Percent of total loans, total past due	0.03%	0.02%
90 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans	$ 5,090	$ 5,017
Percent of total loans, total past due	0.11%	0.11%
Construction
Financing Receivable, Past Due [Line Items]
Loans	$ 299,133	$ 299,000
Construction | Current
Financing Receivable, Past Due [Line Items]
Loans	298,657	296,456
Non-accrual Current Loans	266	405
Construction | Total past due
Financing Receivable, Past Due [Line Items]
Loans	210	2,139
Construction | 30‑59 days past due
Financing Receivable, Past Due [Line Items]
Loans	0	1,919
Construction | 60‑89 days past due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Construction | 30-89 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans	0	0
Construction | 90 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Loans	0	0
Construction | 90 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans	210	220
Residential real estate
Financing Receivable, Past Due [Line Items]
Loans	1,515,134	1,490,438
Residential real estate | Current
Financing Receivable, Past Due [Line Items]
Loans	1,505,322	1,481,294
Non-accrual Current Loans	2,665	2,208
Residential real estate | Total past due
Financing Receivable, Past Due [Line Items]
Loans	7,147	6,936
Residential real estate | 30‑59 days past due
Financing Receivable, Past Due [Line Items]
Loans	2,930	2,420
Residential real estate | 60‑89 days past due
Financing Receivable, Past Due [Line Items]
Loans	354	271
Residential real estate | 30-89 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans	723	1,469
Residential real estate | 90 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Loans	145	108
Residential real estate | 90 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans	2,995	2,668
Commercial real estate
Financing Receivable, Past Due [Line Items]
Loans	2,272,867	2,286,154
Commercial real estate | Current
Financing Receivable, Past Due [Line Items]
Loans	2,268,791	2,281,767
Non-accrual Current Loans	2,703	3,149
Commercial real estate | Total past due
Financing Receivable, Past Due [Line Items]
Loans	1,373	1,238
Commercial real estate | 30‑59 days past due
Financing Receivable, Past Due [Line Items]
Loans	433	16
Commercial real estate | 60‑89 days past due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate | 30-89 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate | 90 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial real estate | 90 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans	940	1,222
Commercial
Financing Receivable, Past Due [Line Items]
Loans	229,594	229,939
Commercial | Current
Financing Receivable, Past Due [Line Items]
Loans	226,101	228,859
Non-accrual Current Loans	1,305	516
Commercial | Total past due
Financing Receivable, Past Due [Line Items]
Loans	2,188	564
Commercial | 30‑59 days past due
Financing Receivable, Past Due [Line Items]
Loans	2,137	48
Commercial | 60‑89 days past due
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial | 30-89 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans	0	0
Commercial | 90 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Loans	0	488
Commercial | 90 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans	51	28
Consumer
Financing Receivable, Past Due [Line Items]
Loans	325,076	328,896
Consumer | Current
Financing Receivable, Past Due [Line Items]
Loans	320,503	323,376
Non-accrual Current Loans	0	2
Consumer | Total past due
Financing Receivable, Past Due [Line Items]
Loans	4,573	5,518
Consumer | 30‑59 days past due
Financing Receivable, Past Due [Line Items]
Loans	2,200	3,224
Consumer | 60‑89 days past due
Financing Receivable, Past Due [Line Items]
Loans	138	1,391
Consumer | 30-89 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans	24	24
Consumer | 90 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Loans	1,317	0
Consumer | 90 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans	894	879
Credit Cards
Financing Receivable, Past Due [Line Items]
Loans	6,921	6,583
Credit Cards | Current
Financing Receivable, Past Due [Line Items]
Loans	6,676	6,370
Non-accrual Current Loans	0	0
Credit Cards | Total past due
Financing Receivable, Past Due [Line Items]
Loans	245	213
Credit Cards | 30‑59 days past due
Financing Receivable, Past Due [Line Items]
Loans	58	35
Credit Cards | 60‑89 days past due
Financing Receivable, Past Due [Line Items]
Loans	89	36
Credit Cards | 30-89 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans	0	0
Credit Cards | 90 days past due and still accruing
Financing Receivable, Past Due [Line Items]
Loans	98	142
Credit Cards | 90 days past due and not accruing
Financing Receivable, Past Due [Line Items]
Loans	$ 0	$ 0