Joint Venture - Statements of Assets and Liabilities (Details) - USD ($) $ in Thousands |
Mar. 31, 2026 |
Dec. 31, 2025 |
Mar. 31, 2025 |
Dec. 31, 2024 |
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|---|---|---|---|---|---|---|---|---|---|---|
| ASSETS | ||||||||||
| Amortized Cost | $ 25,063,146 | [1] | $ 25,109,408 | [2] | ||||||
| Fair Value | 25,007,853 | 25,337,420 | ||||||||
| Cash | 703,413 | 590,666 | $ 434,307 | $ 228,899 | ||||||
| Total assets | 26,289,900 | 26,304,427 | ||||||||
| LIABILITIES | ||||||||||
| Debt | 12,865,354 | 12,950,206 | ||||||||
| Total liabilities | 13,854,926 | 13,867,596 | ||||||||
| MEMBERS’ EQUITY | ||||||||||
| Members’ Equity | 5,015 | 4,931 | ||||||||
| Total Members’ Equity | 12,434,974 | 12,436,831 | $ 9,638,063 | $ 8,733,932 | ||||||
| Total liabilities and net assets | 26,289,900 | 26,304,427 | ||||||||
| Nonconsolidated Investee or group of investees | ULTRA III | ||||||||||
| ASSETS | ||||||||||
| Amortized Cost | 1,608,786 | |||||||||
| Fair Value | 1,611,174 | |||||||||
| Cash | 49,783 | 37,543 | ||||||||
| Interest receivable | 5,103 | 9,546 | ||||||||
| Total assets | 1,666,060 | 1,561,449 | ||||||||
| LIABILITIES | ||||||||||
| Debt | 1,161,129 | 1,068,394 | ||||||||
| Interest payable and other liabilities | 17,829 | 16,661 | ||||||||
| Total liabilities | 1,178,958 | 1,085,055 | ||||||||
| MEMBERS’ EQUITY | ||||||||||
| Members’ Equity | 487,102 | 476,394 | ||||||||
| Total Members’ Equity | 487,102 | 476,394 | ||||||||
| Total liabilities and net assets | $ 1,666,060 | $ 1,561,449 | ||||||||
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- Definition Payable For Investments Purchased And Other Liabilities No definition available.
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- Definition Amount of asset recognized for present right to economic benefit. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- References No definition available.
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- Definition Amount of cash and cash equivalent, and cash and cash equivalent restricted to withdrawal or usage; attributable to continuing operation. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Aggregate par or stated value of issued nonredeemable common stock (or common stock redeemable solely at the option of the issuer). This item includes treasury stock repurchased by the entity. Note: elements for number of nonredeemable common shares, par value and other disclosure concepts are in another section within stockholders' equity. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Represents the aggregate of total long-term debt, including current maturities and short-term debt. No definition available.
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- Definition Amount of dividend and interest receivable from investment. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Cost of the investment. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Fair value of investment in security owned. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of liability recognized for present obligation requiring transfer or otherwise providing economic benefit to others. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition Amount of liabilities and equity items, including the portion of equity attributable to noncontrolling interests, if any. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of equity (deficit) attributable to parent. Excludes temporary equity and equity attributable to noncontrolling interest. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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