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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
Mar. 31, 2012
Dec. 31, 2011
Land under option agreement [Line Items]    
Deposits and pre-acquisition costs $ 56,355 $ 57,047
Remaining Purchase Price 699,414 697,994
Land, not owned, under option agreements 26,121 24,905
Consolidated VIE [Member]
   
Land under option agreement [Line Items]    
Deposits and pre-acquisition costs 3,208 2,781
Remaining Purchase Price 12,193 5,957
Land, not owned, under option agreements 4,461 3,837
Unconsolidated VIE [Member]
   
Land under option agreement [Line Items]    
Deposits and pre-acquisition costs 21,121 21,180
Remaining Purchase Price 231,010 240,958
Land, not owned, under option agreements 0 0
Other Land Option Agreements Member
   
Land under option agreement [Line Items]    
Deposits and pre-acquisition costs 32,026 33,086
Remaining Purchase Price 456,211 451,079
Land, not owned, under option agreements $ 21,660 $ 21,068