Commitments And Contingencies (Other Contingencies) (Details) (USD $)	3 Months Ended			12 Months Ended	0 Months Ended	3 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2011	Dec. 31, 2008	Dec. 31, 2013	Aug. 08, 2014	Jun. 30, 2014	Dec. 31, 2011 Home Homeowner	Dec. 31, 2014	Dec. 31, 2007	Jul. 31, 2006	Dec. 31, 2012 acre	Apr. 15, 2011 Homeowner
Loss Contingencies [Line Items]
Residual value guarantee liability	$ 7,800,000
Environmental Claims For Site In Goodyear Arizona [Member]
Loss Contingencies [Line Items]
Estimated liability			65,200,000					79,300,000	41,500,000
Additional charge	49,000,000	30,300,000	24,300,000
Accrued environmental loss contingencies, current portion of total gross estimated liability								15,500,000
Other receivables								17,100,000
Loss contingency reimbursement rate										21.00%
Environmental Claims For Crab Orchard National Wildlife Refuge Superfund Site [Member]
Loss Contingencies [Line Items]
Approximate size of referenced site, acres											55,000
amount paid into escrow				166,667
Environmental Claims For Site In Roseland New Jersey [Member]
Loss Contingencies [Line Items]
Additional charge	6,800,000
Approximate number of homes tested for contaminants							40
Number of homes where contaminants were found							3
Homeowners Filing Suits Against Company				139								3
Number of tenants who filed a separate lawsuit												1
Number of members in the purported class							138
Homes Suing Company Where Vapor Mitigation Equipment Was Installed				3
Loss Contingency, Damages Paid, Value					$ 6,500,000	$ 6,500