Loans and the Allowance for Loan Losses - Past Due Loans Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	$ 5,088,839	$ 4,992,785
Recorded Investment Over 90 Days Past Due and Still Accruing	855	127
30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	5,293	3,692
60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	13,415	3,386
Greater Than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	17,015	12,020
Total Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	35,723	19,098
Current
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	5,053,116	4,973,687
Real Estate Loans:
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	3,594,909	3,570,120
Recorded Investment Over 90 Days Past Due and Still Accruing	785	64
Real Estate Loans: | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	2,807	2,311
Real Estate Loans: | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	12,472	3,063
Real Estate Loans: | Greater Than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	13,268	10,210
Real Estate Loans: | Total Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	28,547	15,584
Real Estate Loans: | Current
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	3,566,362	3,554,536
Real Estate Loans: | Commercial
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	2,215,889	2,217,928
Recorded Investment Over 90 Days Past Due and Still Accruing	662	44
Real Estate Loans: | Commercial | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	1,071	240
Real Estate Loans: | Commercial | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	10,932	536
Real Estate Loans: | Commercial | Greater Than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	2,901	2,954
Real Estate Loans: | Commercial | Total Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	14,904	3,730
Real Estate Loans: | Commercial | Current
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	2,200,985	2,214,198
Real Estate Loans: | Construction
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	662,013	669,798
Recorded Investment Over 90 Days Past Due and Still Accruing	0	0
Real Estate Loans: | Construction | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	12	279
Real Estate Loans: | Construction | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	594	1,320
Real Estate Loans: | Construction | Greater Than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	5,811	3,198
Real Estate Loans: | Construction | Total Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	6,417	4,797
Real Estate Loans: | Construction | Current
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	655,596	665,001
Real Estate Loans: | Residential
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	717,007	682,394
Recorded Investment Over 90 Days Past Due and Still Accruing	123	20
Real Estate Loans: | Residential | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	1,724	1,792
Real Estate Loans: | Residential | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	946	1,207
Real Estate Loans: | Residential | Greater Than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	4,556	4,058
Real Estate Loans: | Residential | Total Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	7,226	7,057
Real Estate Loans: | Residential | Current
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	709,781	675,337
Commercial
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	1,426,957	1,358,838
Recorded Investment Over 90 Days Past Due and Still Accruing	70	52
Commercial | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	2,239	1,101
Commercial | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	909	71
Commercial | Greater Than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	3,277	1,622
Commercial | Total Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	6,425	2,794
Commercial | Current
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	1,420,532	1,356,044
Consumer and Other
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	66,973	63,827
Recorded Investment Over 90 Days Past Due and Still Accruing	0	11
Consumer and Other | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	247	280
Consumer and Other | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	34	252
Consumer and Other | Greater Than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	470	188
Consumer and Other | Total Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	751	720
Consumer and Other | Current
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	$ 66,222	$ 63,107