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Nature of Operations and Summary of Significant Accounting Policies - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands | 9 Months Ended
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Sep. 28, 2019 | Sep. 29, 2018
Accounting Policies [Abstract] |  |
Cash Paid for Interest | $ 9,711 | $ 5,914
Cash Paid for Income Taxes, Net of Refunds | 18,037 | 20,823
Non-Cash Investing Activities: |  |
Post-closing adjustment | 0 | 397
Liabilities assumed of acquired business | 28,865 | 0
Non-cash additions to property, plant, and equipment | 304 | 783
Non-Cash Financing Activities: |  |
Issuance of Company common stock upon vesting of restricted stock units | 3,908 | 3,976
Dividends declared but unpaid | $ 2,593 | $ 2,444

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