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Financial Highlights - Schedule of Financial Highlights (Parenthetical) (Details)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Investment Company, Financial Highlights [Abstract]                    
Incentive fee waived 0.00% 0.00% (0.11%) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%
Expenses other than incentive fee 10.40% 8.90% 10.10% 8.50% 7.60% 6.90% 8.10% 8.70% 8.10% 7.80%
Incentive fee, net of incentive fee waiver 1.60% 6.50% 1.70% 2.70% 3.10% 2.90% 3.60% 2.60% 2.20% 3.20%
Total expenses 12.00% 15.40% 11.80% 11.20% 10.70% 9.80% 11.70% 11.30% 10.30% 11.00%
Total expenses, before base management fee waiver 12.10% 15.40% 11.80% 11.20% 10.70% 9.80% 11.70% 11.30% 10.30% 11.00%
Base management fee waiver (0.10%) 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00% 0.00%