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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Dec. 31, 2023
Investments, cost | $ 2,551,299 | $ 2,535,576
Restricted cash not held in foreign currency | 13,373 | 0
Foreign currencies, cost | $ 15,572 | $ 13,023
Common stock par value (in dollars per share) | $ 0.001 | $ 0.001
Common stock, shares authorized (in shares) | 150,000,000 | 150,000,000
Common stock, shares issued (in shares) | 105,951,159 | 106,067,070
Common stock, shares outstanding (in shares) | 105,951,159 | 106,067,070
Credit Support Agreements |  |
Derivate asset, cost | $ 58,000 | $ 58,000
Non-Control / Non-Affiliate investments |  |
Investments, cost | 2,065,014 | 2,053,548
Affiliate investments |  |
Investments, cost | 382,732 | 378,865
Control investments |  |
Investments, cost | $ 103,553 | $ 103,163

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