Investments - Schedule of Commercial Mortgage Loan Participations (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	$ 403,732	$ 282,871
Carrying value, gross, percent	102.00%	101.00%
Less allowance for credit losses	$ (7,644)	$ (3,672)	$ (1,789)
Allowance for credit losses, percent	(2.00%)	(1.00%)
Carrying value, net of valuation allowance	$ 396,088	$ 279,199
Carrying value, net, percent	100.00%	100.00%
Texas
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	$ 75,131	$ 45,111
Carrying value, gross, percent	19.00%	16.00%
Florida
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	$ 63,308	$ 48,233
Carrying value, gross, percent	16.00%	17.00%
New Jersey
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	$ 51,744	$ 44,574
Carrying value, gross, percent	13.00%	16.00%
California
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	$ 48,371	$ 54,721
Carrying value, gross, percent	12.00%	20.00%
Alabama
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	$ 35,850	$ 11,003
Carrying value, gross, percent	9.00%	4.00%
New York
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	$ 34,975	$ 20,284
Carrying value, gross, percent	9.00%	7.00%
Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	$ 94,353	$ 58,945
Carrying value, gross, percent	24.00%	21.00%
Multi-family
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	$ 111,234	$ 116,299
Carrying value, gross, percent	28.00%	42.00%
Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	$ 110,456	$ 57,267
Carrying value, gross, percent	28.00%	20.00%
Retail
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	$ 65,612	$ 23,925
Carrying value, gross, percent	16.00%	9.00%
Hospitality
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	$ 73,931	$ 43,897
Carrying value, gross, percent	19.00%	16.00%
Mixed use
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	$ 35,960	$ 34,749
Carrying value, gross, percent	9.00%	12.00%
Office
Accounts, Notes, Loans and Financing Receivable [Line Items]
Carrying value	$ 6,539	$ 6,734
Carrying value, gross, percent	2.00%	2.00%

Financing Receivable, Allowance For Credit Losses, Percent

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