Condensed Consolidated Income Statements (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013
Income Statement [Abstract]
Net Sales	$ 186,516	$ 191,472	$ 366,269	$ 367,387
Cost of Sales
Cost of goods sold	149,073	154,156	293,756	297,218
Gross Profit	37,443	37,316	72,513	70,169
Selling, General and Administrative Expenses	20,868	22,273	41,955	44,824
Operating Income	16,575	15,043	30,558	25,345
Interest Expense	6,994	7,442	14,119	15,265
Income Before Taxes	9,581	7,601	16,439	10,080
Income Tax Expense	3,109	2,097	5,338	869
Net Income	$ 6,472	$ 5,504	$ 11,101	$ 9,211
Earnings Per Share
Basic earnings (loss) per share (in dollars per share)	$ 0.60	$ 0.52	$ 1.02	$ 0.87
Diluted earnings (loss) per share (in dollars per share)	$ 0.59	$ 0.51	$ 1.00	$ 0.86
Weighted-Average Number of Common Shares Outstanding
Basic (in shares)	10,871	10,648	10,864	10,624
Diluted (in shares)	11,045	10,790	11,122	10,731