Nature of Operations and Summary of Significant Accounting Policies - Loans (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) segment	May 05, 2022	Dec. 31, 2021 USD ($)	May 07, 2021
Loans and Leases Receivable Disclosure [Line Items]
Number of Loan Portfolio Segments | segment	15
Accrued interest on loans, excluded from amortized cost of loans	$ 35.0		$ 15.4
Initial ACL - Guarantee	$ 1.2
Loan Sale and Freddie Mac Q Series Securitization
Loans and Leases Receivable Disclosure [Line Items]
First loss position in loan portfolio, maximum securitization pool, percentage	12.00%	12.00%		10.00%