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Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Statement of Stockholders' Equity [Abstract]
Cash dividends declared per ordinary share	$ 0.970	$ 0.855	$ 0.755
Unrealized (loss) gain on derivatives, net of tax	$ (26,608)	$ 24,508	$ 12,514
Unrealized (loss) gain on short-term interest-bearing investments, net of tax	(1,592)	(410)	568
Unrealized (loss) on defined benefit plan, net of tax	$ (4,531)	$ (5,308)	$ (6,987)

X

- Definition

Accumulated unrealized gain (loss), after tax, 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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Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

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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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