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Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Cash dividends declared per ordinary share	$ 2.06	$ 1.872	$ 1.7
Net unrealized (losses) gains on cash flow hedges, net of tax	$ 24,262	$ 3,037	$ (34,677)
Unrealized loss on short-term interest-bearing investments, net of tax	0	(5,238)	(16,203)
Unrealized loss on defined benefit plan, net of tax	$ (1,627)	$ (2,209)	$ (2,392)

X

- Definition

Amount, after tax, of accumulated unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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Aggregate dividends declared during the period for each share of common stock outstanding.

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