Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Income Statement [Abstract]
Net Revenues	$ 147,309	$ 180,495	$ 320,784	$ 353,061
Cost of Sales	114,641	142,430	251,312	279,302
Gross Profit	32,668	38,065	69,472	73,759
Selling, General and Administrative Expenses	21,982	24,461	45,160	47,307
Restructuring Charges	661	0	661	0
Operating Income	10,025	13,604	23,651	26,452
Interest Expense	(3,721)	(4,426)	(7,967)	(8,777)
Income Before Taxes	6,304	9,178	15,684	17,675
Income Tax Expense	1,214	1,363	2,664	2,388
Net Income	$ 5,090	$ 7,815	$ 13,020	$ 15,287
Earnings Per Share
Basic earnings per share (in dollars per share)	$ 0.44	$ 0.68	$ 1.12	$ 1.33
Diluted earnings per share (in dollars per share)	$ 0.43	$ 0.66	$ 1.10	$ 1.30
Weighted-Average Number of Common Shares Outstanding
Basic (in shares)	11,665	11,513	11,638	11,475
Diluted (in shares)	11,828	11,758	11,845	11,754