Consolidated Statements of Changes in Net Assets - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Operations:
Net investment income	$ 34,103,000	$ 21,761,000	$ 82,521,000	$ 65,850,000
Net realized gain (loss)	13,962,000	(5,992,000)	18,742,000	(9,681,000)
Net change in unrealized appreciation (depreciation)	(37,014,000)	7,573,000	(39,302,000)	41,359,000
Net increase in net assets resulting from operations	11,051,000	23,342,000	61,961,000	97,528,000
Stockholder distributions:
Distributions from distributable earnings	(21,951,000)	(21,951,000)	(65,853,000)	(65,853,000)
Net decrease in net assets resulting from stockholder distributions	(21,951,000)	(21,951,000)	(65,853,000)	(65,853,000)
Total increase (decrease) in net assets	(10,900,000)	1,391,000	(3,892,000)	31,675,000
Net assets at beginning of period	1,107,014,000	1,098,288,000	1,100,006,000	1,068,004,000
Net assets at end of period	$ 1,096,114,000	$ 1,099,679,000	$ 1,096,114,000	$ 1,099,679,000
Net asset value per common share	$ 16.98	$ 17.03	$ 16.98	$ 17.03
Common stock outstanding at end of period	64,562,265	64,562,265	64,562,265	64,562,265