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Basis Of Presentation And Significant Accounting Policies (Schedule Of The Company's Interests In Land Option Agreements) (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Land under option agreement [Line Items]    
Deposits and pre-acquisition costs $ 62,620 $ 57,047
Remaining Purchase Price 819,291 697,994
Land, not owned, under option agreements 11,054 24,905
Consolidated VIE [Member]
   
Land under option agreement [Line Items]    
Deposits and pre-acquisition costs 2,721 2,781
Remaining Purchase Price 3,607 5,957
Land, not owned, under option agreements 3,607 3,837
Unconsolidated VIE [Member]
   
Land under option agreement [Line Items]    
Deposits and pre-acquisition costs 23,290 21,180
Remaining Purchase Price 262,395 240,958
Land, not owned, under option agreements 0 0
Other Land Option Agreements Member
   
Land under option agreement [Line Items]    
Deposits and pre-acquisition costs 36,609 33,086
Remaining Purchase Price 553,289 451,079
Land, not owned, under option agreements $ 7,447 $ 21,068