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Business Acquisition (Details 1) - USD ($)
$ in Thousands
Dec. 30, 2017
Dec. 31, 2016
Dec. 05, 2016
Jan. 02, 2016
Business Acquisition [Line Items]        
Goodwill $ 108,869 $ 103,583   $ 4,988
Enovation Controls, LLC [Member]        
Business Acquisition [Line Items]        
Accounts receivable     $ 9,502  
Inventories     16,979  
Other current assets     176  
Property, plant and equipment     10,546  
Goodwill     103,671  
Intangible assets     108,070  
Other assets     8  
Total assets acquired     248,952  
Accounts payable     (3,260)  
Accrued expenses and other liabilities     (3,745)  
Total liabilities assumed     (7,005)  
Fair value of net assets acquired     $ 241,947