Allowance For Credit Losses (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Mar. 31, 2026	Feb. 01, 2026	Dec. 31, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest	$ 110,686	$ 108,590		$ 92,973	$ 89,785	$ 88,130	$ 87,966
Allowance for credit loss, qualitative adjustment	7,800			3,200
Loan balance	9,731,356			8,051,242
First Citizens Acquisition
Financing Receivable, Allowance for Credit Loss [Line Items]
Financing Receivable, Allowance for Credit Loss, Excluding Accrued Interest			$ 15,600
Loan balance			$ 1,591,776
special purpose mortgage loan program
Financing Receivable, Allowance for Credit Loss [Line Items]
Loan balance	244,400
special purpose mortgage loan program
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss, qualitative adjustment	2,400			2,300
Former First Citizens Loans
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss, qualitative adjustment	3,200
special mention loan
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss, qualitative adjustment	1,200
Loan balance	21,300
Catastrophe
Financing Receivable, Allowance for Credit Loss [Line Items]
Allowance for credit loss, qualitative adjustment	$ 635			$ 561