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Debt Obligations - Collateralized Loan Obligations (Details) | 1 Months Ended | 12 Months Ended
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May 31, 2022 USD ($) tranche subsidiary | Feb. 28, 2022 USD ($) subsidiary tranche | Dec. 31, 2021 USD ($) tranche item | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) item tranche | Dec. 31, 2020 USD ($) tranche item | Dec. 31, 2019 USD ($) item tranche
Debt Obligations |  |  |  |  |  |  |
Proceeds from issuance of securitized debt |  |  |  | $ 2,762,502,000 | $ 4,281,512,000 | $ 668,000,000 |
Securitized debt |  |  | $ 5,892,810,000 | $ 7,849,270,000 | $ 5,892,810,000 |  |
Weighted average rate (as a percent) |  |  | 2.21% | 6.54% | 2.21% |  |
Payoffs and paydowns of collateralized loan obligations |  |  |  | $ 801,141,000 | $ 889,150,000 | 283,125,000 |
Credit and repurchase facilities, Principal/Notional Amount |  |  | $ 4,493,699,000 | $ 3,856,009,000 | $ 4,493,699,000 |  |
Repayment of debt |  |  |  |  |  | $ 70,000,000 |
Structured Transaction Business Segment [Member] |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Weighted average rate (as a percent) |  |  | 2.34% | 6.59% | 2.34% |  |
Deferred financing fees |  |  | $ 7,700,000 | $ 13,300,000 | $ 7,700,000 |  |
Weighted average note rate including certain fees and costs (as a percent) |  |  | 2.51% | 6.95% | 2.51% |  |
Leverage (as a percent) |  |  | 77.00% | 73.00% | 77.00% |  |
Credit and repurchase facilities, Principal/Notional Amount |  |  | $ 3,533,016,000 | $ 3,549,694,000 | $ 3,533,016,000 |  |
Agency Business Segment [Member] |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Weighted average rate (as a percent) |  |  | 1.75% | 5.96% | 1.75% |  |
Deferred financing fees |  |  | $ 4,400,000 | $ 900,000 | $ 4,400,000 |  |
Credit and repurchase facilities, Principal/Notional Amount |  |  | 960,683,000 | 306,315,000 | 960,683,000 |  |
Secured Debt [Member] |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Notional amount of secured floating rate notes |  |  |  | $ 315,800,000 |  |  |
Leverage (as a percent) |  |  |  | 75.00% |  |  |
Collateralized loan obligations |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Debt, Face Value (UPB) |  |  |  | $ 7,649,188,000 |  |  |
Securitized debt |  |  |  | $ 7,615,364,000 |  |  |
Weighted average rate (as a percent) |  |  |  | 6.10% |  |  |
Collateral Loans, Unpaid Principal |  |  |  | $ 8,619,210,000 |  |  |
Collateral Loans, Carrying Value |  |  |  | 8,586,139,000 |  |  |
Cash, Restricted Cash |  |  |  | 480,817,000 |  |  |
Deferred financing fees |  |  | $ 31,900,000 | $ 36,800,000 | $ 31,900,000 |  |
Weighted average note rate including certain fees and costs (as a percent) |  |  | 1.86% | 6.32% | 1.86% |  |
Collateral at risk |  |  | $ 0 | $ 0 | $ 0 |  |
CLO 19 |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Number of tranches of CLO notes issued | tranche | 9 |  |  |  |  |  |
Number of newly-formed wholly-owned subsidiaries | subsidiary | 1 |  |  |  |  |  |
Value of the tranches issued | $ 1,050,000,000.00 |  |  |  |  |  |
Debt, Face Value (UPB) | $ 872,800,000 |  |  | 872,812,000 |  |  |
Securitized debt |  |  |  | $ 866,605,000 |  |  |
Weighted average rate (as a percent) |  |  |  | 6.75% |  |  |
Collateral Loans, Unpaid Principal |  |  |  | $ 952,268,000 |  |  |
Collateral Loans, Carrying Value |  |  |  | 947,336,000 |  |  |
Cash, Restricted Cash |  |  |  | 64,300,000 |  |  |
Replacement period | 2 years |  |  |  |  |  |
Proceeds from issuance of collateralized loan obligations for acquiring additional loan obligations | $ 73,100,000 |  |  |  |  |  |
Maximum period to acquire additional loan obligations | 180 days |  |  |  |  |  |
Weighted average note rate including certain fees and costs (as a percent) | 2.36% |  |  |  |  |  |
Value of portfolio loans and cash as collateral | $ 976,900,000 |  |  |  |  |  |
Face value of loan obligations will be owned by the issuer | $ 1,050,000,000.00 |  |  |  |  |  |
Leverage (as a percent) | 83.00% |  |  |  |  |  |
Credit and repurchase facilities, Principal/Notional Amount | $ 177,200,000 |  |  |  |  |  |
CLO 18 |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Number of tranches of CLO notes issued | tranche |  | 8 |  |  |  |  |
Number of newly-formed wholly-owned subsidiaries | subsidiary |  | 2 |  |  |  |  |
Proceeds from issuance of securitized debt |  | $ 1,860,000,000 |  |  |  |  |
Debt, Face Value (UPB) |  | 1,650,000,000 |  | 1,652,812,000 |  |  |
Securitized debt |  | $ 210,100,000 |  | $ 1,645,711,000 |  |  |
Weighted average rate (as a percent) |  |  |  | 6.19% |  |  |
Collateral Loans, Unpaid Principal |  |  |  | $ 1,899,174,000 |  |  |
Collateral Loans, Carrying Value |  |  |  | 1,891,215,000 |  |  |
Cash, Restricted Cash |  |  |  | 85,970,000 |  |  |
Replacement period |  | 2 years 6 months |  |  |  |  |
Proceeds from issuance of collateralized loan obligations for acquiring additional loan obligations |  | $ 347,300,000 |  |  |  |  |
Maximum period to acquire additional loan obligations |  | 180 days |  |  |  |  |
Notional amount of residual interest retained |  | $ 397,200,000 |  |  |  |  |
Value of portfolio loans and cash as collateral |  | 1,700,000,000 |  |  |  |  |
Face value of loan obligations will be owned by the issuer |  | $ 2,050,000,000.00 |  |  |  |  |
Leverage (as a percent) |  | 81.00% |  |  |  |  |
CLO 18 | One-month LIBOR |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Weighted average note rate including certain fees and costs (as a percent) |  | 1.81% |  |  |  |  |
CLO 18 | Below investment grade |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Notional amount of residual interest retained |  | $ 210,100,000 |  |  |  |  |
CLO 17 |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Number of tranches of CLO notes issued | tranche |  |  | 8 |  |  |  |
Number of newly-formed wholly-owned subsidiaries | item |  |  | 2 |  |  |  |
Value of the tranches issued |  |  | $ 1,910,000,000 |  | 1,910,000,000 |  |
Debt, Face Value (UPB) |  |  | 1,714,125,000 | 1,714,125,000 | 1,714,125,000 |  |
Securitized debt |  |  | $ 1,705,549,000 | $ 1,707,676,000 | $ 1,705,549,000 |  |
Weighted average rate (as a percent) |  |  | 1.81% | 6.16% | 1.81% |  |
Collateral Loans, Unpaid Principal |  |  | $ 1,914,280,000 | $ 1,911,866,000 | $ 1,914,280,000 |  |
Collateral Loans, Carrying Value |  |  | 1,903,997,000 | 1,904,732,000 | 1,903,997,000 |  |
Cash, Restricted Cash |  |  | $ 118,520,000 | 145,726,000 | 118,520,000 |  |
Replacement period |  |  | 2 years 6 months |  |  |  |
Proceeds from issuance of collateralized loan obligations for acquiring additional loan obligations |  |  | $ 315,000,000.0 |  |  |  |
Maximum period to acquire additional loan obligations |  |  | 180 days |  |  |  |
Notional amount of residual interest retained |  |  | $ 385,900,000 |  | 385,900,000 |  |
Value of portfolio loans and cash as collateral |  |  | 1,790,000,000 |  | 1,790,000,000 |  |
Face value of loan obligations will be owned by the issuer |  |  | $ 2,100,000,000 |  | $ 2,100,000,000 |  |
Leverage (as a percent) |  |  | 82.00% |  | 82.00% |  |
Credit and repurchase facilities, Principal/Notional Amount |  |  | $ 194,300,000 |  | $ 194,300,000 |  |
CLO 17 | One-month LIBOR |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Weighted average note rate including certain fees and costs (as a percent) |  |  | 1.68% |  | 1.68% |  |
CLO 17 | Below investment grade |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Notional amount of residual interest retained |  |  | $ 194,300,000 |  | $ 194,300,000 |  |
CLO 16 |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Number of tranches of CLO notes issued | tranche |  |  |  |  | 8 |  |
Number of newly-formed wholly-owned subsidiaries | item |  |  |  |  | 2 |  |
Value of the tranches issued |  |  | 1,370,000,000 |  | $ 1,370,000,000 |  |
Debt, Face Value (UPB) |  |  | 1,237,500,000 | 1,237,500,000 | 1,237,500,000 |  |
Securitized debt |  |  | $ 1,230,093,000 | $ 1,231,887,000 | $ 1,230,093,000 |  |
Weighted average rate (as a percent) |  |  | 1.44% | 5.79% | 1.44% |  |
Collateral Loans, Unpaid Principal |  |  | $ 1,444,573,000 | $ 1,307,244,000 | $ 1,444,573,000 |  |
Collateral Loans, Carrying Value |  |  | 1,436,743,000 | 1,301,794,000 | $ 1,436,743,000 |  |
Cash, Restricted Cash |  |  |  | 106,495,000 |  |  |
Replacement period |  |  |  |  | 2 years 6 months |  |
Proceeds from issuance of collateralized loan obligations for acquiring additional loan obligations |  |  |  |  | $ 313,000,000.0 |  |
Maximum period to acquire additional loan obligations |  |  |  |  | 180 days |  |
Notional amount of residual interest retained |  |  | 262,500,000 |  | $ 262,500,000 |  |
Value of portfolio loans and cash as collateral |  |  | 1,190,000,000 |  | 1,190,000,000 |  |
Face value of loan obligations will be owned by the issuer |  |  | $ 1,500,000,000 |  | $ 1,500,000,000 |  |
Leverage (as a percent) |  |  | 83.00% |  | 83.00% |  |
Credit and repurchase facilities, Principal/Notional Amount |  |  | $ 135,000,000.0 |  | $ 135,000,000.0 |  |
CLO 16 | One-month LIBOR |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Weighted average rate (as a percent) |  |  | 1.31% |  | 1.31% |  |
CLO 16 | Below investment grade |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Notional amount of residual interest retained |  |  | $ 135,000,000.0 |  | $ 135,000,000.0 |  |
CLO 15 |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Number of tranches of CLO notes issued | tranche |  |  |  |  | 8 |  |
Number of newly-formed wholly-owned subsidiaries | item |  |  |  |  | 2 |  |
Value of the tranches issued |  |  | 747,800,000 |  | $ 747,800,000 |  |
Debt, Face Value (UPB) |  |  | 674,412,000 | 674,412,000 | 674,412,000 |  |
Securitized debt |  |  | $ 669,723,000 | $ 671,532,000 | $ 669,723,000 |  |
Weighted average rate (as a percent) |  |  | 1.49% | 5.84% | 1.49% |  |
Collateral Loans, Unpaid Principal |  |  | $ 785,761,000 | $ 797,755,000 | $ 785,761,000 |  |
Collateral Loans, Carrying Value |  |  | 782,682,000 | 795,078,000 | 782,682,000 |  |
Cash, Restricted Cash |  |  | 15,750,000 | 2,861,000 | $ 15,750,000 |  |
Replacement period |  |  |  |  | 2 years 6 months |  |
Proceeds from issuance of collateralized loan obligations for acquiring additional loan obligations |  |  |  |  | $ 162,000,000.0 |  |
Maximum period to acquire additional loan obligations |  |  |  |  | 180 days |  |
Notional amount of residual interest retained |  |  | $ 140,600,000 |  | $ 140,600,000 |  |
Weighted average note rate including certain fees and costs (as a percent) |  |  | 1.37% |  | 1.37% |  |
Value of portfolio loans and cash as collateral |  |  | $ 653,000,000.0 |  | $ 653,000,000.0 |  |
Face value of loan obligations will be owned by the issuer |  |  | $ 815,000,000.0 |  | $ 815,000,000.0 |  |
Leverage (as a percent) |  |  | 83.00% |  | 83.00% |  |
Credit and repurchase facilities, Principal/Notional Amount |  |  | $ 73,400,000 |  | $ 73,400,000 |  |
CLO 15 | Below investment grade |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Notional amount of residual interest retained |  |  | 73,400,000 |  | $ 73,400,000 |  |
CLO 14 |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Number of tranches of CLO notes issued | tranche |  |  |  |  | 8 |  |
Number of newly-formed wholly-owned subsidiaries | item |  |  |  |  | 2 |  |
Value of the tranches issued |  |  | 724,200,000 |  | $ 724,200,000 |  |
Debt, Face Value (UPB) |  |  | 655,475,000 | 655,475,000 | 655,475,000 |  |
Securitized debt |  |  | $ 650,947,000 | $ 652,617,000 | $ 650,947,000 |  |
Weighted average rate (as a percent) |  |  | 1.45% | 5.80% | 1.45% |  |
Collateral Loans, Unpaid Principal |  |  | $ 717,396,000 | $ 732,247,000 | $ 717,396,000 |  |
Collateral Loans, Carrying Value |  |  | 715,154,000 | 730,057,000 | 715,154,000 |  |
Cash, Restricted Cash |  |  | 53,342,000 | 37,090,000 | $ 53,342,000 |  |
Replacement period |  |  |  |  | 2 years 6 months |  |
Proceeds from issuance of collateralized loan obligations for acquiring additional loan obligations |  |  |  |  | $ 149,800,000 |  |
Maximum period to acquire additional loan obligations |  |  |  |  | 180 days |  |
Notional amount of residual interest retained |  |  | 129,500,000 |  | $ 129,500,000 |  |
Value of portfolio loans and cash as collateral |  |  | 635,200,000 |  | 635,200,000 |  |
Face value of loan obligations will be owned by the issuer |  |  | $ 785,000,000.0 |  | $ 785,000,000.0 |  |
Leverage (as a percent) |  |  | 84.00% |  | 84.00% |  |
Credit and repurchase facilities, Principal/Notional Amount |  |  | $ 68,700,000 |  | $ 68,700,000 |  |
CLO 14 | One-month LIBOR |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Weighted average note rate including certain fees and costs (as a percent) |  |  | 1.33% |  | 1.33% |  |
CLO 14 | Below investment grade |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Notional amount of residual interest retained |  |  | $ 68,700,000 |  | $ 68,700,000 |  |
CLO 13 |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Number of tranches of CLO notes issued | tranche |  |  |  |  |  | 8 |
Number of newly-formed wholly-owned subsidiaries | item |  |  |  |  |  | 2 |
Value of the tranches issued |  |  |  |  |  | $ 738,000,000.0 |
Debt, Face Value (UPB) |  |  | 668,000,000 | 462,769,000 | 668,000,000 | $ 668,000,000.0 |
Securitized debt |  |  | $ 665,006,000 | $ 461,005,000 | $ 665,006,000 |  |
Weighted average rate (as a percent) |  |  | 1.54% | 6.03% | 1.54% |  |
Collateral Loans, Unpaid Principal |  |  | $ 740,369,000 | $ 552,182,000 | $ 740,369,000 |  |
Collateral Loans, Carrying Value |  |  | 738,265,000 | 550,924,000 | 738,265,000 |  |
Cash, Restricted Cash |  |  | 48,543,000 | 37,875,000 | 48,543,000 |  |
Replacement period |  |  |  |  |  | 3 years |
Proceeds from issuance of collateralized loan obligations for acquiring additional loan obligations |  |  |  |  |  | $ 159,500,000 |
Maximum period to acquire additional loan obligations |  |  |  |  |  | 180 days |
Notional amount of residual interest retained |  |  |  |  |  | $ 132,000,000.0 |
Value of portfolio loans and cash as collateral |  |  |  |  |  | 640,500,000 |
Face value of loan obligations will be owned by the issuer |  |  |  |  |  | $ 800,000,000.0 |
Leverage (as a percent) |  |  |  |  |  | 84.00% |
Credit and repurchase facilities, Principal/Notional Amount |  |  |  |  |  | $ 70,000,000.0 |
Repayment of debt |  |  |  | 205,200,000 |  |  |
CLO 13 | One-month LIBOR |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Weighted average note rate including certain fees and costs (as a percent) |  |  |  |  |  | 1.41% |
CLO 13 | Below investment grade |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Notional amount of residual interest retained |  |  |  |  |  | $ 70,000,000.0 |
CLO 12 |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Number of tranches of CLO notes issued | tranche |  |  |  |  |  |  | 8
Number of newly-formed wholly-owned subsidiaries | item |  |  |  |  |  |  | 2
Proceeds from issuance of securitized debt |  |  |  |  |  |  | $ 124,100,000
Value of the tranches issued |  |  |  |  |  |  | 585,800,000
Debt, Face Value (UPB) |  |  | 534,193,000 | 379,283,000 | 534,193,000 |  | 534,200,000
Securitized debt |  |  | $ 531,939,000 | $ 378,331,000 | $ 531,939,000 |  | $ 51,600,000
Weighted average rate (as a percent) |  |  | 1.62% | 6.09% | 1.62% |  |
Collateral Loans, Unpaid Principal |  |  | $ 557,249,000 | $ 466,474,000 | $ 557,249,000 |  |
Collateral Loans, Carrying Value |  |  | 555,974,000 | 465,003,000 | 555,974,000 |  |
Cash, Restricted Cash |  |  | 35,635,000 | 500,000 | 35,635,000 |  |
Replacement period |  |  |  |  |  |  | 3 years
Maximum period to acquire additional loan obligations |  |  |  |  |  |  | 180 days
Notional amount of residual interest retained |  |  |  |  |  |  | $ 100,800,000
Value of portfolio loans and cash as collateral |  |  |  |  |  |  | 510,900,000
Face value of loan obligations will be owned by the issuer |  |  |  |  |  |  | $ 635,000,000.0
Leverage (as a percent) |  |  |  |  |  |  | 84.00%
Repayment of debt |  |  |  | 154,900,000 |  |  |
CLO 12 | One-month LIBOR |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Weighted average note rate including certain fees and costs (as a percent) |  |  |  |  |  |  | 1.50%
CLO 12 | Below investment grade |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Notional amount of residual interest retained |  |  |  |  |  |  | $ 51,600,000
CLO 10 |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Value of the tranches issued |  | 441,000,000.0 |  |  |  |  |
Debt, Face Value (UPB) |  |  | 441,000,000 |  | 441,000,000 |  |
Securitized debt |  |  | $ 439,553,000 |  | $ 439,553,000 |  |
Weighted average rate (as a percent) |  |  | 1.57% |  | 1.57% |  |
Collateral Loans, Unpaid Principal |  |  | $ 485,460,000 |  | $ 485,460,000 |  |
Collateral Loans, Carrying Value |  |  | 483,995,000 |  | 483,995,000 |  |
Cash, Restricted Cash |  |  | 57,706,000 |  | 57,706,000 |  |
Value of portfolio loans and cash as collateral |  | $ 1,400,000 |  |  |  |  |
CLO 11 and CLO 9 |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Debt Instrument Redemption Value |  |  | 889,200,000 |  | 889,200,000 |  |
Deferred fees expensed as interest expense |  |  |  |  | 3,400,000 |  |
CLO 8 |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Debt Instrument Redemption Value |  |  |  |  |  | 282,900,000 |
Deferred fees expensed as interest expense |  |  |  |  |  | $ 1,500,000 |
CLO VII |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Proceeds from issuance of collateralized loan obligations for acquiring additional loan obligations |  |  |  | 230,000,000.0 | 133,700,000 |  |
Q Series securitization |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Debt, Face Value (UPB) |  |  |  | 236,878,000 |  |  |
Securitized debt |  |  |  | $ 233,906,000 |  |  |
Weighted average rate (as a percent) |  |  |  | 6.30% |  |  |
Collateral Loans, Unpaid Principal |  |  |  | $ 315,837,000 |  |  |
Collateral Loans, Carrying Value |  |  |  | $ 313,965,000 |  |  |
Weighted average note rate including certain fees and costs (as a percent) |  |  |  | 6.66% |  |  |
Total securitized debt |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Debt, Face Value (UPB) |  |  | 5,924,705,000 | $ 7,886,066,000 | 5,924,705,000 |  |
Securitized debt |  |  | $ 5,892,810,000 | $ 7,849,270,000 | $ 5,892,810,000 |  |
Weighted average rate (as a percent) |  |  | 1.59% | 6.11% | 1.59% |  |
Collateral Loans, Unpaid Principal |  |  | $ 6,645,088,000 | $ 8,935,047,000 | $ 6,645,088,000 |  |
Collateral Loans, Carrying Value |  |  | 6,616,810,000 | 8,900,104,000 | 6,616,810,000 |  |
Cash, Restricted Cash |  |  | $ 329,496,000 | $ 480,817,000 | $ 329,496,000 |  |
Joint Repurchase Facility 1.00 Billion [Member] | Structured Transaction Business Segment [Member] |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Weighted average rate (as a percent) |  |  | 2.04% | 6.39% | 2.04% |  |
Credit and repurchase facilities, Principal/Notional Amount |  |  | $ 676,608,000 | $ 499,891,000 | $ 676,608,000 |  |
$225M credit facility | Structured Transaction Business Segment [Member] |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Weighted average rate (as a percent) |  |  | 2.79% | 6.90% | 2.79% |  |
Credit and repurchase facilities, Principal/Notional Amount |  |  | $ 28,213,000 | $ 47,398,000 | $ 28,213,000 |  |
$200M credit facility | Agency Business Segment [Member] |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Weighted average rate (as a percent) |  |  | 1.60% | 5.76% | 1.60% |  |
Credit and repurchase facilities, Principal/Notional Amount |  |  | $ 115,351,000 | $ 31,519,000 | $ 115,351,000 |  |
$50M credit facility | Structured Transaction Business Segment [Member] |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Weighted average rate (as a percent) |  |  | 2.13% | 6.48% | 2.13% |  |
Credit and repurchase facilities, Principal/Notional Amount |  |  | $ 29,200,000 | $ 29,200,000 | $ 29,200,000 |  |
$50M credit facility | Agency Business Segment [Member] |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Weighted average rate (as a percent) |  |  | 1.40% | 5.65% | 1.40% |  |
Credit and repurchase facilities, Principal/Notional Amount |  |  | $ 9,295,000 | $ 14,671,000 | $ 9,295,000 |  |
$25M credit facility | Structured Transaction Business Segment [Member] |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Weighted average rate (as a percent) |  |  | 4.06% | 6.99% | 4.06% |  |
Credit and repurchase facilities, Principal/Notional Amount |  |  | $ 1,235,000 | $ 19,177,000 | $ 1,235,000 |  |
$1M master security agreement | Structured Transaction Business Segment [Member] |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Weighted average rate (as a percent) |  |  | 4.01% |  | 4.01% |  |
Credit and repurchase facilities, Principal/Notional Amount |  |  | $ 635,000 |  | $ 635,000 |  |
Repurchase facility - securities | Structured Transaction Business Segment [Member] |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Weighted average rate (as a percent) |  |  | 3.40% | 6.99% | 3.40% |  |
Credit and repurchase facilities, Principal/Notional Amount |  |  | $ 30,849,000 | $ 12,832,000 | $ 30,849,000 |  |
$750M ASAP agreement | Agency Business Segment [Member] |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Weighted average rate (as a percent) |  |  | 1.40% | 5.21% | 1.40% |  |
Value of portfolio loans and cash as collateral |  |  |  | $ 750,000,000.0 |  |  |
Credit and repurchase facilities, Principal/Notional Amount |  |  | $ 182,130,000 | $ 29,476,000 | $ 182,130,000 |  |
$500M joint repurchase facility | Agency Business Segment [Member] |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Weighted average rate (as a percent) |  |  | 2.11% | 6.52% | 2.11% |  |
Credit and repurchase facilities, Principal/Notional Amount |  |  | $ 399,470,000 | $ 105,275,000 | $ 399,470,000 |  |
$150M credit facility | Agency Business Segment [Member] |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Weighted average rate (as a percent) |  |  | 1.51% | 5.76% | 1.51% |  |
Credit and repurchase facilities, Principal/Notional Amount |  |  | $ 16,657,000 | $ 57,974,000 | $ 16,657,000 |  |
$1.3M repurchase facility (2) | Agency Business Segment [Member] |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Weighted average rate (as a percent) |  |  | 3.00% | 6.66% | 3.00% |  |
Credit and repurchase facilities, Principal/Notional Amount |  |  | $ 1,253,000 | $ 534,000 | $ 1,253,000 |  |
$25M credit facility. | Structured Transaction Business Segment [Member] |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Weighted average rate (as a percent) |  |  | 2.38% |  | 2.38% |  |
Credit and repurchase facilities, Principal/Notional Amount |  |  | $ 10,285,000 |  | $ 10,285,000 |  |
Warehouse Repurchase Facility 500 Million [Member] | Structured Transaction Business Segment [Member] |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Weighted average rate (as a percent) |  |  |  | 7.16% |  |  |
Credit and repurchase facilities, Principal/Notional Amount |  |  |  | $ 155,121,000 |  |  |
Warehouse Repurchase Facility 500 Million [Member] | Agency Business Segment [Member] |  |  |  |  |  |  |
Debt Obligations |  |  |  |  |  |  |
Weighted average rate (as a percent) |  |  | 1.58% | 5.73% | 1.58% |  |
Credit and repurchase facilities, Principal/Notional Amount |  |  | $ 236,527,000 | $ 66,866,000 | $ 236,527,000 |  |

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