Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement [Abstract]
Net Revenues	$ 628,941	$ 721,088	$ 629,307
Cost of Sales	491,203	568,891	506,711
Gross Profit	137,738	152,197	122,596
Selling, General and Administrative Expenses	89,808	95,964	84,007
Restructuring Charges	2,424	0	14,671
Operating Income	45,506	56,233	23,918
Interest Expense	(13,653)	(18,290)	(13,024)
Loss on Extinguishment of Debt	0	(180)	(926)
Other Income, Net	128	0	303
Income Before Taxes	31,981	37,763	10,271
Income Tax Expense	2,807	5,302	1,236
Net Income	$ 29,174	$ 32,461	$ 9,035
Earnings Per Share
Basic earnings per share (in dollars per share)	$ 2.50	$ 2.82	$ 0.79
Diluted earnings per share (in dollars per share)	$ 2.45	$ 2.75	$ 0.77
Weighted-Average Number of Shares Outstanding
Basic (in shares)	11,676	11,518	11,390
Diluted (in shares)	11,932	11,792	11,659