Commitments And Contingencies (Other Contingencies) (Details) (USD $)				3 Months Ended					12 Months Ended		12 Months Ended
	Jan. 01, 2014	Dec. 31, 2013	Mar. 31, 2007	Dec. 31, 2011 Environmental Claims For A Site In Goodyear Arizona [Member]	Dec. 31, 2008 Environmental Claims For A Site In Goodyear Arizona [Member]	Dec. 31, 2013 Environmental Claims For A Site In Goodyear Arizona [Member]	Dec. 31, 2007 Environmental Claims For A Site In Goodyear Arizona [Member]	Jul. 31, 2006 Environmental Claims For A Site In Goodyear Arizona [Member]	Dec. 31, 2013 Environmental Claims For Crab Orchard National Wildlife Refuge Superfund Site [Member]	Dec. 31, 2012 Environmental Claims For Crab Orchard National Wildlife Refuge Superfund Site [Member] acre	Dec. 31, 2011 Environmental Claims For Site In Roseland New Jersey [Member] Home Homeowner	Apr. 15, 2011 Environmental Claims For Site In Roseland New Jersey [Member] Home	Jan. 08, 2010 Merrimac Securities Class Action Lawsuit [Member]	Jan. 11, 2013 Subsequent Event [Member]
Loss Contingencies [Line Items]
Estimated liability					$ 65,200,000	$ 32,800,000	$ 41,500,000
Additional charge				30,300,000	24,300,000
Accrued environmental loss contingencies, current portion of total gross estimated liability						12,200,000
Other receivables						9,300,000
Stock price per share													$ 16.00
Settlement fund														2,000,000
Contribution by Company to settlement fund														150,000
Approximate size of referenced site, acres										55,000
amount paid into escrow									166,667
Approximate number of homes tested for contaminants											40
Number of homes where contaminants were found											3
Number of tenants who filed a separate lawsuit												1
Number of members in the purported class											141
Loss contingency reimbursement rate								21.00%
Residual value guarantee liability	7,800,000	9,500,000	14,100,000
Property, Plant, and Equipment, Fair Value Disclosure	$ 9,500,000		$ 22,100,000