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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
Dec. 31, 2011
Dec. 31, 2010
Land under option agreement [Line Items]    
Deposits and pre-acquisition costs $ 57,047 $ 95,063
Remaining Purchase Price 697,994 670,542
Land, not owned, under option agreements 24,905 50,781
Consolidated VIE [Member]
    
Land under option agreement [Line Items]    
Deposits and pre-acquisition costs 2,781 41,813
Remaining Purchase Price 5,957 44,565
Land, not owned, under option agreements 3,837 42,401
Unconsolidated VIE [Member]
    
Land under option agreement [Line Items]    
Deposits and pre-acquisition costs 21,180 10,280
Remaining Purchase Price 240,958 193,978
Land, not owned, under option agreements 0 0
Other Land Option Agreements Member
    
Land under option agreement [Line Items]    
Deposits and pre-acquisition costs 33,086 42,970
Remaining Purchase Price 451,079 431,999
Land, not owned, under option agreements $ 21,068 $ 8,380