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Commitments And Contingencies (Other Contingencies) (Detail) (USD $)
 3 Months Ended 12 Months Ended 12 Months Ended
Mar. 31, 2014
Dec. 31, 2013
Homeowner
Apr. 15, 2011
Homeowner
Dec. 31, 2011
Environmental Claims For A Site In Goodyear Arizona
Dec. 31, 2008
Environmental Claims For A Site In Goodyear Arizona
Mar. 31, 2014
Environmental Claims For A Site In Goodyear Arizona
Dec. 31, 2007
Environmental Claims For A Site In Goodyear Arizona
Jul. 31, 2006
Environmental Claims For A Site In Goodyear Arizona
Dec. 31, 2013
Environmental Claims For Crab Orchard National Wildlife Refuge Superfund Site
Dec. 31, 2012
Environmental Claims For Crab Orchard National Wildlife Refuge Superfund Site
acre
Dec. 31, 2011
Environmental Claims For Site In Roseland New Jersey
Homeowner
Home
Loss Contingencies [Line Items]                      
Estimated liability         $ 65,200,000 $ 28,600,000 $ 41,500,000        
Amount of additional remediation activities       30,300,000 24,300,000            
Accrued environmental loss contingencies current           12,200,000          
Loss contingency reimbursement rate               21.00%      
Other receivables           7,800,000          
Approximate size of referenced site, acres                   55,000  
Approximate number of homes tested for contaminants                     40
Number of Homes Where Contaminants Were Found                     3
Homeowners Filing Suits Against Company   139 3                
Homes Suing Company Where Vapor Mitigation Equipment Was Installed   3                  
Number Of Tenants Who Filed Separate Lawsuit     1                
Number of members in the purported class                     141
Airplane operating lease period, years 5 years                    
Fair value of residual value guarantee 7,800,000                    
amount paid into escrow                 166,667    
Fair Value Of Residual Value Guarantee, Fair Value of Operating Lease Asset Threshold $ 9,500,000