Secured borrowings (Details) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2024 USD ($) Lender	Dec. 31, 2023 USD ($) Lender
Secured borrowings and promissory note
Facility size	$ 5,179,854
Carrying Value, Secured borrowings	2,311,969	$ 2,102,075
Asset pledged as collateral without right
Secured borrowings and promissory note
Pledged Assets Carrying Value	3,710,913
Secured borrowings
Secured borrowings and promissory note
Pledged Assets Carrying Value	3,710,913	3,320,583
Borrowings under credit facilities and other financing arrangements
Secured borrowings and promissory note
Facility size	544,264
Carrying Value, Secured borrowings	224,308	149,923
Borrowings under credit facilities and other financing arrangements \| Loans and finance receivables
Secured borrowings and promissory note
Pledged Assets Carrying Value	285,963	212,512
Borrowings under credit facilities and other financing arrangements \| Asset pledged as collateral without right \| Loans and finance receivables
Secured borrowings and promissory note
Pledged Assets Carrying Value	285,963
Borrowings under repurchase agreements
Secured borrowings and promissory note
Facility size	4,635,590
Carrying Value, Secured borrowings	2,087,661	1,952,152
Borrowings under repurchase agreements \| Securities sold under agreements to repurchase
Secured borrowings and promissory note
Pledged Assets Carrying Value	3,424,950	3,108,071
Borrowings under repurchase agreements \| Asset pledged as collateral without right \| Securities sold under agreements to repurchase
Secured borrowings and promissory note
Pledged Assets Carrying Value	$ 3,424,950
SBA \| Borrowings under credit facilities and other financing arrangements
Secured borrowings and promissory note
Number of lenders per asset class \| Lender	3
Facility size	$ 250,000
Carrying Value, Secured borrowings	$ 189,015	117,115
SBA \| Borrowings under credit facilities and other financing arrangements \| Secured Overnight Financing Rate
Secured borrowings and promissory note
Pricing, spread on variable (as a percent)	2.83%
SBA \| Borrowings under credit facilities and other financing arrangements \| Prime rate
Secured borrowings and promissory note
Pricing, spread on variable (as a percent)	(0.82%)
SBA \| Borrowings under credit facilities and other financing arrangements \| Asset pledged as collateral without right \| Loans and finance receivables
Secured borrowings and promissory note
Pledged Assets Carrying Value	$ 238,184
LMM Loans \| Borrowings under repurchase agreements
Secured borrowings and promissory note
Number of lenders per asset class \| Lender	9
Facility size	$ 4,306,000
Carrying Value, Secured borrowings	$ 1,758,071	1,677,885
LMM Loans \| Borrowings under repurchase agreements \| Secured Overnight Financing Rate
Secured borrowings and promissory note
Pricing, spread on variable (as a percent)	3.18%
LMM Loans \| Borrowings under repurchase agreements \| Asset pledged as collateral without right \| Securities sold under agreements to repurchase
Secured borrowings and promissory note
Pledged Assets Carrying Value	$ 2,828,152
LMM loans - USD \| Borrowings under credit facilities and other financing arrangements
Secured borrowings and promissory note
Number of lenders per asset class \| Lender	1
Facility size	$ 80,000
Carrying Value, Secured borrowings	$ 2,645	20,729
LMM loans - USD \| Borrowings under credit facilities and other financing arrangements \| Secured Overnight Financing Rate
Secured borrowings and promissory note
Pricing, spread on variable (as a percent)	1.35%
LMM loans - USD \| Borrowings under credit facilities and other financing arrangements \| Asset pledged as collateral without right \| Loans and finance receivables
Secured borrowings and promissory note
Pledged Assets Carrying Value	$ 2,652
LMM loans - Non-USD \| Borrowings under credit facilities and other financing arrangements
Secured borrowings and promissory note
Number of lenders per asset class \| Lender	1
Facility size	$ 214,264
Carrying Value, Secured borrowings	$ 32,648	$ 12,079
LMM loans - Non-USD \| Borrowings under credit facilities and other financing arrangements \| Euribor Rate
Secured borrowings and promissory note
Pricing, spread on variable (as a percent)	3.00%
LMM loans - Non-USD \| Borrowings under credit facilities and other financing arrangements \| Asset pledged as collateral without right
Secured borrowings and promissory note
Pledged Assets Carrying Value	$ 45,127
LMM loans - Non-USD \| Borrowings under repurchase agreements
Secured borrowings and promissory note
Number of lenders per asset class \| Lender		1
Carrying Value, Secured borrowings		$ 45,031
LMM loans - Non-USD \| Borrowings under repurchase agreements \| Euribor Rate
Secured borrowings and promissory note
Pricing, spread on variable (as a percent)		3.00%
Mortgage backed securities \| Borrowings under repurchase agreements
Secured borrowings and promissory note
Number of lenders per asset class \| Lender	7
Pricing, stated rate (as a percent)	7.95%
Facility size	$ 329,590
Carrying Value, Secured borrowings	329,590	$ 229,236
Mortgage backed securities \| Borrowings under repurchase agreements \| Securities sold under agreements to repurchase
Secured borrowings and promissory note
Pledged Assets Carrying Value	80,093	$ 20,770
Mortgage backed securities \| Borrowings under repurchase agreements \| Asset pledged as collateral without right \| Securities sold under agreements to repurchase
Secured borrowings and promissory note
Pledged Assets Carrying Value	$ 596,798

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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