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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, 2012
Dec. 31, 2011
Land under option agreement [Line Items]    
Deposits and Pre-acquisition Costs $ 70,116 $ 57,047
Remaining Purchase Price 923,392 697,994
Land, not owned, under option agreements 31,066 24,905
Consolidated VIE [Member]
    
Land under option agreement [Line Items]    
Deposits and Pre-acquisition Costs 5,216 2,781
Remaining Purchase Price 8,590 5,957
Land, not owned, under option agreements 8,590 3,837
Unconsolidated VIE [Member]
    
Land under option agreement [Line Items]    
Deposits and Pre-acquisition Costs 24,078 21,180
Remaining Purchase Price 360,495 240,958
Land, not owned, under option agreements 0 0
Other Land Option Agreements Member
    
Land under option agreement [Line Items]    
Deposits and Pre-acquisition Costs 40,822 33,086
Remaining Purchase Price 554,307 451,079
Land, not owned, under option agreements $ 22,476 $ 21,068