Income Taxes (Earings Before Income Taxes by Geographical Area) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Income Taxes
United States									$ 181,671	$ 192,220	$ 175,146
Other countries									37,907	60,527	51,340
Consolidated earnings before income taxes	$ 79,027	$ 54,417	$ 48,647	$ 37,487	$ 86,765	$ 68,687	$ 50,236	$ 47,059	$ 219,578	$ 252,747	$ 226,486

The portion of earnings or loss from continuing operations before income taxes that is attributable to domestic operations.

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Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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The portion of earnings or loss from continuing operations before income taxes that is attributable to foreign operations, which is defined as Income or Loss generated from operations located outside the entity's country of domicile.

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