Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Investments - Schedule of Carrying and Fair Values of the Company???s Debt Obligations (Details)

v3.22.2.2
Fair Value of Investments - Schedule of Carrying and Fair Values of the Company’s Debt Obligations (Details) - USD ($)
Sep. 30, 2022
Dec. 31, 2021
Debt Instrument [Line Items]    
Fair value of debt obligations $ 6,770,139,000 $ 7,217,350,000
Debt issuance costs, net 103,285,000 110,239,000
Net Carrying Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 7,196,154,000 7,079,326,000
Fair Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 6,770,139,000 7,217,350,000
Level 1    
Debt Instrument [Line Items]    
Fair value of debt obligations 0 0
Level 2    
Debt Instrument [Line Items]    
Fair value of debt obligations 3,617,563,000 4,258,563,000
Level 3    
Debt Instrument [Line Items]    
Fair value of debt obligations 3,152,576,000 2,958,787,000
Line of Credit | SPV Asset Facility II    
Debt Instrument [Line Items]    
Debt issuance costs, net 4,900,000 4,300,000
Line of Credit | SPV Asset Facility II | Net Carrying Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 245,107,000 95,668,000
Line of Credit | SPV Asset Facility II | Fair Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 245,107,000 95,668,000
Line of Credit | SPV Asset Facility III    
Debt Instrument [Line Items]    
Debt issuance costs, net 800,000 1,000,000
Line of Credit | SPV Asset Facility III | Net Carrying Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 249,208,000 188,979,000
Line of Credit | SPV Asset Facility III | Fair Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 249,208,000 188,979,000
Line of Credit | SPV Asset Facility IV    
Debt Instrument [Line Items]    
Debt issuance costs, net 2,600,000 2,200,000
Line of Credit | SPV Asset Facility IV | Net Carrying Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 73,863,000 152,727,000
Line of Credit | SPV Asset Facility IV | Fair Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 73,863,000 152,727,000
Line of Credit | CLO I    
Debt Instrument [Line Items]    
Debt issuance costs, net   3,000,000
Secured Debt | CLO I    
Debt Instrument [Line Items]    
Debt issuance costs, net 2,700,000 3,000,000
Secured Debt | CLO I | Net Carrying Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 387,253,000 386,989,000
Secured Debt | CLO I | Fair Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 387,253,000 386,989,000
Secured Debt | CLO II    
Debt Instrument [Line Items]    
Debt issuance costs, net 2,900,000 3,100,000
Secured Debt | CLO II | Net Carrying Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 257,127,000 256,942,000
Secured Debt | CLO II | Fair Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 257,127,000 256,942,000
Secured Debt | CLO III    
Debt Instrument [Line Items]    
Debt issuance costs, net 1,900,000 2,100,000
Secured Debt | CLO III | Net Carrying Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 258,098,000 257,937,000
Secured Debt | CLO III | Fair Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 258,098,000 257,937,000
Secured Debt | CLO IV    
Debt Instrument [Line Items]    
Debt issuance costs, net 4,800,000 5,200,000
Secured Debt | CLO IV | Net Carrying Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 287,674,000 287,342,000
Secured Debt | CLO IV | Fair Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 287,674,000 287,342,000
Secured Debt | CLO V    
Debt Instrument [Line Items]    
Debt issuance costs, net 2,700,000 1,800,000
Secured Debt | CLO V | Net Carrying Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 506,965,000 194,167,000
Secured Debt | CLO V | Fair Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 506,965,000 194,167,000
Secured Debt | CLO VI    
Debt Instrument [Line Items]    
Debt issuance costs, net 1,800,000 1,900,000
Secured Debt | CLO VI | Net Carrying Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 258,246,000 258,093,000
Secured Debt | CLO VI | Fair Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 258,246,000 258,093,000
Secured Debt | CLO VII    
Debt Instrument [Line Items]    
Debt issuance costs, net 1,900,000  
Secured Debt | CLO VII | Net Carrying Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 237,266,000 0
Secured Debt | CLO VII | Fair Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 237,266,000 0
Unsecured debt | 2024 Notes    
Debt Instrument [Line Items]    
Debt issuance costs, net 3,400,000 5,000,000
Unsecured debt | 2024 Notes | Net Carrying Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 384,328,000 406,481,000
Unsecured debt | 2024 Notes | Fair Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 396,000,000 427,000,000
Unsecured debt | 2025 Notes    
Debt Instrument [Line Items]    
Debt issuance costs, net 4,200,000 5,300,000
Unsecured debt | 2025 Notes | Net Carrying Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 420,841,000 419,674,000
Unsecured debt | 2025 Notes | Fair Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 398,438,000 443,063,000
Unsecured debt | July 2025 Notes    
Debt Instrument [Line Items]    
Debt issuance costs, net 5,100,000 6,400,000
Unsecured debt | July 2025 Notes | Net Carrying Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 494,912,000 493,637,000
Unsecured debt | July 2025 Notes | Fair Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 458,750,000 518,750,000
Unsecured debt | 2026 Notes    
Debt Instrument [Line Items]    
Debt issuance costs, net 7,400,000 8,900,000
Unsecured debt | 2026 Notes | Net Carrying Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 492,635,000 491,085,000
Unsecured debt | 2026 Notes | Fair Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 455,000,000 526,250,000
Unsecured debt | July 2026 Notes    
Debt Instrument [Line Items]    
Debt issuance costs, net 18,100,000 21,500,000
Unsecured debt | July 2026 Notes | Net Carrying Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 981,868,000 978,537,000
Unsecured debt | July 2026 Notes | Fair Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 860,000,000 1,017,500,000
Unsecured debt | 2027 Notes    
Debt Instrument [Line Items]    
Debt issuance costs, net 8,400,000 9,700,000
Unsecured debt | 2027 Notes | Net Carrying Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 433,638,000 497,537,000
Unsecured debt | 2027 Notes | Fair Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 401,250,000 488,750,000
Unsecured debt | 2028 Notes    
Debt Instrument [Line Items]    
Debt issuance costs, net 14,600,000 16,400,000
Unsecured debt | 2028 Notes | Net Carrying Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 835,356,000 833,588,000
Unsecured debt | 2028 Notes | Fair Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 648,125,000 837,250,000
Revolving Credit Facility | Line of Credit    
Debt Instrument [Line Items]    
Debt issuance costs, net 15,100,000 12,400,000
Revolving Credit Facility | Line of Credit | Revolving Credit Facility    
Debt Instrument [Line Items]    
Debt issuance costs, net 15,100,000 12,400,000
Revolving Credit Facility | Line of Credit | Revolving Credit Facility | Net Carrying Value    
Debt Instrument [Line Items]    
Fair value of debt obligations 391,769,000 879,943,000
Revolving Credit Facility | Line of Credit | Revolving Credit Facility | Fair Value    
Debt Instrument [Line Items]    
Fair value of debt obligations $ 391,769,000 $ 879,943,000