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Nature of Operations and Summary of Significant Accounting Policies - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 30, 2019	Mar. 31, 2018
Accounting Policies [Abstract]
Cash Paid for Interest	$ 2,782	$ 2,459
Cash Paid for Income Taxes, Net of Refunds	4,679	8,455
Non-Cash Investing Activities:
Post-closing adjustments	1,567	397
Liabilities assumed of acquired business	29,664	0
Non-cash additions to property, plant, and equipment	193	1,816
Non-Cash Financing Activities:
Issuance of Company common stock upon vesting of restricted stock units	3,278	2,755
Dividends declared but unpaid	$ 2,570	$ 2,440

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