CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025
Share-Based Payment Arrangement, Recognized Amount [Abstract]
Tax on reclassifications of losses to net income on derivatives	$ (80)	$ (80)	$ (159)	$ (159)
Tax on adjustment to postemployment benefit obligation	$ 2	$ 58	$ 3	$ 116

Amount, after reclassification adjustment, of tax (expense) benefit for (increase) decrease in accumulated other comprehensive income of defined benefit plan.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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