Business Segments and Geographic Area Information (Details 2) - 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
Net sales:
Total net sales	$ 964,230	$ 967,890	$ 937,755	$ 964,468	$ 944,288	$ 949,275	$ 919,471	$ 940,464	$ 3,834,343	$ 3,753,498	$ 3,622,216
Identifiable assets:
Total assets	2,094,351				2,004,319				2,094,351	2,004,319	1,924,493
Changes in foreign currency exchange rates
Loss on foreign currency exchange									(87,300)
United States
Net sales:
Total net sales									3,145,894	3,031,000	2,943,959
Identifiable assets:
Total assets	1,460,413				1,405,671				1,460,413	1,405,671	1,356,969
Foreign
Net sales:
Total net sales									688,449	722,498	678,257
Identifiable assets:
Total assets	$ 491,908				$ 523,213				$ 491,908	$ 523,213	$ 530,190