Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Earnings Per Share [Abstract]
Increase (decrease) in net assets resulting from operations	$ 594,980	$ 793,312	$ 466,355
Weighted average shares of common stock outstanding, basic (in shares)	390,068,596	390,104,585	394,006,852	392,297,907	388,645,561	324,630,279	146,422,371	67,082,905	21,345,191
Weighted average shares of common stock outstanding, diluted (in shares)	390,068,596	390,104,585	394,006,852
Earnings per common share, basic (in usd per share)	$ 1.53	$ 2.03	$ 1.18
Earnings per common share, diluted (in usd per share)	$ 1.53	$ 2.03	$ 1.18