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Income Taxes - Narrative (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Income Tax Disclosure [Abstract]    
Aggregate gross unrealized appreciation $ 31,155 $ 28,028
Aggregate gross unrealized depreciation 122,246 104,087
Cumulative gross unrealized appreciation (depreciation) for federal income tax purposes 91,091 76,059
Aggregate cost of securities for federal income tax $ 1,851,121 $ 1,830,098