Investment in Derivative Instruments - Balance Sheet Classification (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Sep. 30, 2025
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Net unrealized gain position	$ 6,444		$ 7,916
Unrealized loss on derivative instruments	0	$ 0
Cash Flow Hedging
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Unrealized loss on derivative instruments	6,400		7,900
Other assets \| Interest rate swap
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative asset, fair value, gross asset	$ 6,444		$ 7,916

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period.

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