Business Acquisitions (Schedule of Estimated Purchase Price Allocation) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011	Jun. 30, 2011 Business Acquisition, Acquiree - IDS [Member]	Dec. 28, 2012 Business Acquisition, Acquiree - Duarte Business [Member]
Accounts receivable					$ 14,245
Inventories					30,149
Other current assets					10,370
Current assets				14,627
Investments in marketable securities				8,463
Property, plant, and equipment				1,954	11,804
Goodwill	551,624	461,374	462,282	24,188	88,477
Intangible assets				11,882	86,700
Other noncurrent assets					18,097
Total assets acquired				61,114	259,842
Other current liabilities				5,505	29,676
Warranty accrual				2,250
Postretirement benefits				434
Deferred tax liabilities				2,472
Other tax - noncurrent				3,292
Other noncurrent liabilities					31,306
Total liabilities assumed				13,953	60,982
Net assets acquired				$ 47,161	$ 198,860