Acquisitions and Dispositions (Details) (USD $)	3 Months Ended	12 Months Ended			5 Months Ended		12 Months Ended			12 Months Ended		12 Months Ended
	Sep. 28, 2013	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Dec. 28, 2013 Minimum [Member]	Dec. 28, 2013 Maximum [Member]	Dec. 29, 2012 KME Yorkshire Limited [Member]	Dec. 28, 2013 KME Yorkshire Limited [Member] Subsequent Event [Member]	Dec. 29, 2012 Westemeyer Industries, Inc. [Member]	Aug. 31, 2013 Howell Metal Company [Member]	Dec. 28, 2013 Howell Metal Company [Member]	Dec. 25, 2010 Tube Forming, L.P. [Member]	Dec. 31, 2011 Tube Forming, L.P. [Member]
Business Acquisition [Line Items]
Cost of acquisition									$ 11,600,000		$ 55,300,000		$ 6,900,000
Pro forma net sales							196,100,000			156,300,000
Portion of outstanding stock acquired (in hundredths)									100.00%
Cost of acquisition		2,158,541,000	2,189,938,000	2,417,797,000				29,700,000
Fair value of assets acquired									7,500,000		64,400,000
Fair value of assets acquired - receivables									2,000,000		14,600,000
Fair value of assets acquired - inventories									1,900,000		27,600,000
Fair value of assets acquired - property, plant and equipment									3,600,000		21,600,000
Fair value of assets acquired -other current assets											600,000
Fair value of liabilities assumed											11,400,000
Fair value of liabilities assumed - accounts payable and accrued expenses											9,900,000
Fair value of liabilities assumed - other current liabilities											1,500,000
Fair value of assets acquired - current liabilities									1,000,000
Remaining purchase price allocated to goodwill									2,300,000		300,000
Remaining purchase price allocated to other intangible assets									2,700,000		2,000,000
Estimated net sales												35,000,000
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Lease-back term					8 months	14 months
Total sales price of property		66,200,000
Cash proceeds from sale of property		61,200,000
Amount receivable due to sale of property		5,000,000
Pre-tax gain on sale of property	39,800,000	39,765,000	0	0
Amount of pre-diluted share after tax	$ 0.81
Net book value of assets disposed		15,900,000
Goodwill allocated to disposal group		10,500,000
Extended supply agreement term		5 years
Impairment charge recognized on fair value of disposed assets	$ 3,200,000