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Acquisitions (Schedule of Assets Acquired and Liabilities Assumed) (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Sep. 30, 2016
Apr. 01, 2016
Oct. 02, 2015
Business Acquisition [Line Items]        
Goodwill $ 11,182 $ 11,196 $ 16,672 $ 14,292
SeaBear And Northport [Member]        
Business Acquisition [Line Items]        
Accounts receivable 66      
Inventories 197      
Other current assets 40      
Property, plant and equipment 27      
Identifiable intangible assets 6,706      
Less, accounts payable and accruals 350      
Less, long term liabilities 580      
Total identifiable net assets 6,106      
Goodwill 3,046      
Net assets acquired $ 9,152