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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
Jun. 30, 2012
Dec. 31, 2011
Land under option agreement [Line Items]    
Deposits and pre-acquisition costs $ 55,912 $ 57,047
Remaining Purchase Price 726,475 697,994
Land, not owned, under option agreements 10,482 24,905
Consolidated VIE [Member]
    
Land under option agreement [Line Items]    
Deposits and pre-acquisition costs 4,224 2,781
Remaining Purchase Price 30,914 5,957
Land, not owned, under option agreements 5,455 3,837
Unconsolidated VIE [Member]
    
Land under option agreement [Line Items]    
Deposits and pre-acquisition costs 20,428 21,180
Remaining Purchase Price 239,178 240,958
Land, not owned, under option agreements 0 0
Other Land Option Agreements Member
    
Land under option agreement [Line Items]    
Deposits and pre-acquisition costs 31,260 33,086
Remaining Purchase Price 456,383 451,079
Land, not owned, under option agreements $ 5,027 $ 21,068