Loans and Allowance for Credit Losses (Allowance for Credit Losses on Financing Receivables) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 57,351	$ 16,643	$ 16,643
Total gross charge-offs	(654)	(107)
Recoveries	89	87
Net (charge-offs) recoveries	(565)	(20)
Provisions	550	1,050
Ending Balance	57,336	28,464	57,351
Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance		10,791	10,791
Construction
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	3,935	2,973	2,973
Total gross charge-offs	(12)	0	0
Recoveries	2	3
Net (charge-offs) recoveries	(10)	3
Provisions	(367)	(1,509)
Ending Balance	3,558	2,689	3,935
Construction | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance		1,222	1,222
Residential real estate
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	21,949	2,622	2,622
Total gross charge-offs	(1)	0	(119)
Recoveries	2	31
Net (charge-offs) recoveries	1	31
Provisions	(1,182)	1,120
Ending Balance	20,768	8,747	21,949
Residential real estate | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance		4,974	4,974
Commercial real estate
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	20,975	4,899	4,899
Total gross charge-offs	0	0	(1,326)
Recoveries	0	0
Net (charge-offs) recoveries	0	0
Provisions	275	1,217
Ending Balance	21,250	9,858	20,975
Commercial real estate | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance		3,742	3,742
Commercial
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	2,671	1,652	1,652
Total gross charge-offs	0	(107)	(243)
Recoveries	1	53
Net (charge-offs) recoveries	1	(54)
Provisions	207	(139)
Ending Balance	2,879	1,860	2,671
Commercial | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance		401	401
Consumer
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	7,601	4,497	4,497
Total gross charge-offs	(525)	0	(574)
Recoveries	76	0
Net (charge-offs) recoveries	(449)	0
Provisions	1,530	361
Ending Balance	8,682	5,310	7,601
Consumer | Consumer Loans, Demand Deposit Overdrafts
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Total gross charge-offs	(200)
Consumer | Cumulative Effect, Period of Adoption, Adjustment
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance		$ 452	452
Credit Cards
Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss [Roll Forward]
Beginning Balance	220
Total gross charge-offs	(116)		(111)
Recoveries	8
Net (charge-offs) recoveries	(108)
Provisions	87
Ending Balance	$ 199		$ 220