Income Taxes (Earings Before Income Taxes by Geographical Area) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Income Taxes
United States									$ 172,315	$ 148,837	$ 148,604
Other countries									68,634	78,407	50,967
Consolidated earnings before income taxes	$ 68,727	$ 57,559	$ 57,591	$ 57,072	$ 75,076	$ 62,468	$ 56,756	$ 32,944	$ 240,949	$ 227,244	$ 199,571