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Nature of Operations and Summary of Significant Accounting Policies - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018
Accounting Policies [Abstract]
Cash Paid for Interest	$ 6,108	$ 4,268
Cash Paid for Income Taxes, Net of Refunds	12,975	14,808
Non-Cash Investing Activities:
Post-closing adjustment	0	237
Liabilities assumed of acquired business	30,064	0
Non-cash additions to property, plant, and equipment	306	1,033
Non-Cash Financing Activities:
Issuance of Company common stock upon vesting of restricted stock units	3,743	3,264
Dividends declared but unpaid	$ 2,590	$ 2,442

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Future cash outflow to pay for purchases of fixed assets that have occurred.

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