Consolidated Statements of Cash Flows (unaudited) (Parenthetical) $ in Thousands	9 Months Ended
	Jun. 30, 2024 USD ($)
Statement of Cash Flows [Abstract]
Foreign currencies, cost	$ 6,381
Restricted foreign currencies, cost	717
Distribution paid	199,173	[1]
GBDC 3
Distribution paid	$ 9,516

[1] Includes payment of $9,516 distribution payable to GBDC 3 shareholders that was assumed in the GBDC 3 Merger (defined in Note 2).