Commitments and Contingencies - Summary of Unfunded Commitments (Parenthetical) (Details) - USD ($) $ in Thousands		Dec. 31, 2022	Mar. 31, 2022
Commitments And Contingencies [Line Items]
Unfunded commitments	[1]	$ 399,836	$ 486,620
Bridge Loan Commitments
Commitments And Contingencies [Line Items]
Unfunded commitments		0	0
Unfunded Revolver Commitments | Merx Aviation Finance, LLC
Commitments And Contingencies [Line Items]
Unfunded commitments		$ 50,000	$ 25,000

[1] The Company also had an unfunded revolver commitment to its fully controlled affiliate Merx Aviation Finance, LLC of $50,000 and $25,000 as of December 31, 2022 and March 31, 2022, respectively. Given the Company’s controlling interest, the timing and the amount of the funding has not been determined.