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Investments - Schedule of Fair Value Portfolio of Investments by Geographic Location (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022
Schedule Of Investments [Line Items] |  |
Investments at Fair Value | $ 3,248,046 | $ 2,963,955
Geographic Concentration Risk | Total Investments Benchmark, Geographical |  |
Schedule Of Investments [Line Items] |  |
Investments at Fair Value | $ 3,248,046 | $ 2,963,955
Percentage of Total Portfolio | 100.00% | 100.00%
Geographic Concentration Risk | Total Investments Benchmark, Geographical | United States |  |
Schedule Of Investments [Line Items] |  |
Investments at Fair Value | $ 2,861,615 | $ 2,670,520
Percentage of Total Portfolio | 88.10% | 90.10%
Geographic Concentration Risk | Total Investments Benchmark, Geographical | United Kingdom |  |
Schedule Of Investments [Line Items] |  |
Investments at Fair Value | $ 222,136 | $ 171,629
Percentage of Total Portfolio | 6.90% | 5.80%
Geographic Concentration Risk | Total Investments Benchmark, Geographical | Netherlands |  |
Schedule Of Investments [Line Items] |  |
Investments at Fair Value | $ 89,995 | $ 88,915
Percentage of Total Portfolio | 2.80% | 3.00%
Geographic Concentration Risk | Total Investments Benchmark, Geographical | Israel |  |
Schedule Of Investments [Line Items] |  |
Investments at Fair Value | $ 52,868 | $ 9,052
Percentage of Total Portfolio | 1.60% | 0.30%
Geographic Concentration Risk | Total Investments Benchmark, Geographical | Canada |  |
Schedule Of Investments [Line Items] |  |
Investments at Fair Value | $ 15,730 | $ 19,472
Percentage of Total Portfolio | 0.50% | 0.70%
Geographic Concentration Risk | Total Investments Benchmark, Geographical | Denmark |  |
Schedule Of Investments [Line Items] |  |
Investments at Fair Value | $ 4,173 | $ 0
Percentage of Total Portfolio | 0.10% | 0.00%
Geographic Concentration Risk | Total Investments Benchmark, Geographical | Germany |  |
Schedule Of Investments [Line Items] |  |
Investments at Fair Value | $ 1,144 | $ 990
Percentage of Total Portfolio | 0.00% | 0.00%
Geographic Concentration Risk | Total Investments Benchmark, Geographical | Other |  |
Schedule Of Investments [Line Items] |  |
Investments at Fair Value | $ 385 | $ 573
Percentage of Total Portfolio | 0.00% | 0.00%
Geographic Concentration Risk | Total Investments Benchmark, Geographical | Ireland |  |
Schedule Of Investments [Line Items] |  |
Investments at Fair Value | $ 0 | $ 2,804
Percentage of Total Portfolio | 0.00% | 0.10%

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