Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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Percentage of total revenues from external customers attributed to all foreign countries in total from which the entity derives revenues.

+ References

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Segment Information (External Net Sales by Geographical Area) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Revenues from External Customers and Long-Lived Assets [Line Items]
Consolidated net sales	$ 606,788	$ 548,622	$ 500,381	$ 442,894	$ 590,922	$ 507,664	$ 479,382	$ 445,110	$ 2,098,685	$ 2,023,078	$ 2,038,303
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									1,211,902	1,118,833	1,054,895
All Other Countries [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									119,806	137,661	172,211
Europe [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									$ 478,725	$ 537,901	$ 569,322
Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Percent of external net sales, foreign countries									8.00%	10.00%	10.00%
Asia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Net sales									$ 288,252	$ 228,683	$ 241,875