Income Taxes - Summary of Components of Distributed Earnings on Tax Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Undistributed net investment income	$ 15,656	$ 13,350	$ 8,439
Other temporary differences	(437)	(447)	(456)
Investment Company, Distributable Earnings (Loss), Accumulated Long-Term Capital Gain (Loss)	0	0	0
Capital loss carryover	(41,134)	(34,248)	(63,271)
Unrealized appreciation (depreciation)	(36,583)	7,437	20,630
Components of tax distributable earnings at year end	$ (62,498)	$ (13,908)	$ (34,658)

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Amount of accumulated undistributed tax basis earnings (deficit).

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Amount of accumulated undistributed earnings (deficit) from unrealized appreciation (depreciation) of investment company.

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