Consolidated Statements of Changes in Net Assets (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Beginning balance	$ 547,071	$ 576,052
Beginning balance, Shares	40,509,269
Net increase (decrease) in net assets resulting from operations	$ 12,047	11,984
Acquisition of treasury stock, value	(10,609)
Dividends paid to stockholders	(19,040)	(18,229)
Ending balance	$ 529,469	569,807
Ending balance, Shares	39,622,162
Common Stock
Beginning balance	$ 414	$ 414
Beginning balance, Shares	40,509,269	40,509,269
Acquisition of treasury stock	(887,096)
Shares Retired	(11)
Ending balance	$ 414	$ 414
Ending balance, Shares	39,622,162	40,509,269
Treasury Stock
Beginning balance	$ (10,816)	$ (10,816)
Acquisition of treasury stock, value	(10,609)
Ending balance	(21,425)	(10,816)
Paid-in Capital in Excess of Par Value
Beginning balance	605,110	605,774
Tax reclassification	(2)
Ending balance	605,108	605,774
Accumulated Undistributed Earnings (Losses)
Beginning balance	(47,637)	(19,320)
Net increase (decrease) in net assets resulting from operations	12,047	11,984
Dividends paid to stockholders	(19,040)	(18,229)
Tax reclassification	2
Ending balance	$ (54,628)	$ (25,565)