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Nature of Operations and Summary of Significant Accounting Policies - Supplemental Cash Flow Information (Details) - USD ($)
$ in Thousands
 6 Months Ended
Jul. 02, 2016
Jul. 04, 2015
Non-Cash Investing Activities:    
Fair value of assets acquired $ 86,555 $ 0
Cash paid for acquired business (58,894) 0
Liabilities assumed of acquired business 27,661 0
Non-Cash Financing Activities:    
Issuance of Company common stock 3,057 2,967
Dividends declared but unpaid $ 2,070 $ 1,852