Significant Accounting Policies (Details)		3 Months Ended		9 Months Ended
		Sep. 30, 2025 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2025 USD ($) segment	Sep. 30, 2024 USD ($)
Accounting Policies [Abstract]
Offering costs, amortization period		12 months		12 months
Payments for deferred financing costs		$ 1,500,000	$ 10,100,000	$ 1,958,000	$ 17,939,000
Amortization of deferred financing costs		1,711,000	1,209,000	5,281,000	2,633,000
Agent fees received		1,600,000	1,300,000	3,700,000	2,700,000
Agent fees recognized as earned		1,300,000	884,000	3,700,000	2,200,000
U.S. federal excise tax		0		0
Current federal tax	[1]	236,000	2,000	399,000	34,000
Deferred federal tax	[1]	247,000	337,000	1,247,000	553,000
Income tax penalties				0
Income tax interest				0
Syndication and other origination fee income		$ 1,600,000	$ 397,000	$ 3,500,000	$ 2,700,000
Number of operating segments | segment				1
Number of reporting segments | segment				1

[1] Related to the Company’s wholly-owned, consolidated subsidiaries, Twin Brook Equity XVIII Corp. and Twin Brook Equity XXXIII Corp., which are treated as corporations for United States federal income tax purposes