Loans and the Allowance for Loan Losses - Past Due Loans Receivable (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	$ 6,684,263	$ 6,189,490
Recorded Investment Over 90 Days Past Due and Still Accruing	1,404	2,215
30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	12,133	23,371
60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	16,258	41,235
Greater Than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	98,491	47,466
Total Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	126,882	112,072
Current
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	6,557,381	6,077,418
Real Estate Loans:
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	4,668,663	4,194,413
Recorded Investment Over 90 Days Past Due and Still Accruing	147	442
Real Estate Loans: | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	7,913	7,601
Real Estate Loans: | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	11,398	40,327
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	63,641	22,611
Real Estate Loans: | Total Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	82,952	70,539
Real Estate Loans: | Current
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	4,585,711	4,123,874
Real Estate Loans: | Commercial
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	2,841,626	2,611,279
Recorded Investment Over 90 Days Past Due and Still Accruing	0	363
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	3,217	1,838
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	3,578	38,693
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	43,544	10,097
Real Estate Loans: | Commercial | Total Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	50,339	50,628
Real Estate Loans: | Commercial | Current
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	2,791,287	2,560,651
Real Estate Loans: | Construction
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	685,817	639,069
Recorded Investment Over 90 Days Past Due and Still Accruing	49	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	1,357	1,988
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	5,375	72
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	7,246	4,363
Real Estate Loans: | Construction | Total Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	13,978	6,423
Real Estate Loans: | Construction | Current
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	671,839	632,646
Real Estate Loans: | Residential
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	1,141,220	944,065
Recorded Investment Over 90 Days Past Due and Still Accruing	98	79
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	3,339	3,775
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	2,445	1,562
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	12,851	8,151
Real Estate Loans: | Residential | Total Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	18,635	13,488
Real Estate Loans: | Residential | Current
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	1,122,585	930,577
Commercial
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	1,943,412	1,921,833
Recorded Investment Over 90 Days Past Due and Still Accruing	1,243	1,760
Commercial | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	3,953	15,585
Commercial | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	4,843	552
Commercial | Greater Than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	34,660	24,692
Commercial | Total Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	43,456	40,829
Commercial | Current
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	1,899,956	1,881,004
Consumer and Other
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	72,188	73,244
Recorded Investment Over 90 Days Past Due and Still Accruing	14	13
Consumer and Other | 30-59 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	267	185
Consumer and Other | 60-89 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	17	356
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	190	163
Consumer and Other | Total Past Due
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	474	704
Consumer and Other | Current
Financing Receivable, Past Due [Line Items]
Financing receivable, excluding accrued interest, before allowance for credit loss	$ 71,714	$ 72,540