Investments at Fair Value - Summary of Industry Composition of Investments at Amortized Cost and Fair Value (Detail) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Debt Securities, Available-for-Sale [Line Items]
Investments at amortized cost	$ 663,527	$ 450,797
Investments at fair value	$ 655,446	$ 452,442
Percentage of investments at fair value	100.00%	100.00%
Aerospace and Defense [Member]
Debt Securities, Available-for-Sale [Line Items]
Investments at amortized cost	$ 22,215	$ 21,038
Investments at fair value	$ 22,276	$ 21,190
Percentage of investments at fair value	3.40%	4.70%
Construction and Engineering [Member]
Debt Securities, Available-for-Sale [Line Items]
Investments at amortized cost	$ 29,717	$ 29,766
Investments at fair value	$ 29,835	$ 29,867
Percentage of investments at fair value	4.50%	6.60%
Distributors [Member]
Debt Securities, Available-for-Sale [Line Items]
Investments at amortized cost	$ 39,468	$ 39,437
Investments at fair value	$ 39,280	$ 39,520
Percentage of investments at fair value	6.00%	8.70%
Diversified Consumer Services [Member]
Debt Securities, Available-for-Sale [Line Items]
Investments at amortized cost	$ 88,950	$ 43,813
Investments at fair value	$ 88,890	$ 43,793
Percentage of investments at fair value	13.60%	9.70%
Health Care Providers and Services [Member]
Debt Securities, Available-for-Sale [Line Items]
Investments at amortized cost	$ 141,732	$ 89,033
Investments at fair value	$ 141,829	$ 89,426
Percentage of investments at fair value	21.60%	19.80%
Health Care Technology [Member]
Debt Securities, Available-for-Sale [Line Items]
Investments at amortized cost	$ 20,393	$ 20,389
Investments at fair value	$ 20,655	$ 20,518
Percentage of investments at fair value	3.20%	4.50%
Insurance Sector [Member]
Debt Securities, Available-for-Sale [Line Items]
Investments at amortized cost	$ 84,599	$ 46,427
Investments at fair value	$ 84,338	$ 46,478
Percentage of investments at fair value	12.80%	10.30%
Professional Services [Member]
Debt Securities, Available-for-Sale [Line Items]
Investments at amortized cost	$ 101,365	$ 25,834
Investments at fair value	$ 101,353	$ 26,340
Percentage of investments at fair value	15.50%	5.80%
Software [Member]
Debt Securities, Available-for-Sale [Line Items]
Investments at amortized cost	$ 135,088	$ 135,060
Investments at fair value	$ 126,990	$ 135,310
Percentage of investments at fair value	19.40%	29.90%