Investments, Equity Method and Joint Ventures (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Sep. 30, 2024
Schedule of Equity Method Investments [Line Items]
Payments to Acquire Investments	$ 44,900	$ 380
Equity Method Investments	44,900		$ 0
CB&I
Schedule of Equity Method Investments [Line Items]
Payments to Acquire Investments	$ 44,900
Equity Method Investment, Ownership Percentage	12.50%
Equity Method Investments	$ 44,900
Income (Loss) from Equity Method Investments	$ 0

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

- Definition

Amount of income (loss) for proportionate share of equity method investee's income (loss).

+ References + Details

- Definition

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.

+ References + Details

IES Holdings, Inc. 10-Q