Other Assets - Information on Commercial Mortgage Loans (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) investment	Dec. 31, 2022 USD ($)
Other Assets [Line Items]
Fair Value / Carrying Value	$ 1,550,234
Senior Living Property
Other Assets [Line Items]
Number of collateral | investment	1
Parking
Other Assets [Line Items]
Number of collateral | investment	1
Office Property
Other Assets [Line Items]
Number of collateral | investment	1
Commercial Mortgage Bridge Loan
Other Assets [Line Items]
Fair Value / Carrying Value	$ 51,426	$ 61,510
Unpaid Principal Balance	$ 51,602	$ 61,510
Weighted Average Coupon (as a percent)	13.18%	11.54%
Weighted Average Term to Maturity (Months)	2 months	10 months
Commercial Mortgage Bridge Loan | UPB 60+ Days Delinquent
Other Assets [Line Items]
Unpaid Principal Balance	$ 3,521	$ 0
Commercial Mortgage Bridge Loan | Minimum
Other Assets [Line Items]
Participation range to total UPB (as a percent)	49.00%
Commercial Mortgage Bridge Loan | Maximum
Other Assets [Line Items]
Participation range to total UPB (as a percent)	75.00%