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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, 2013
Dec. 31, 2012
Land under option agreement [Line Items]    
Deposits and pre-acquisition costs $ 87,944 $ 70,116
Remaining Purchase Price 1,401,193 923,392
Land, not owned, under option agreements 27,612 31,066
Consolidated VIE [Member]
    
Land under option agreement [Line Items]    
Deposits and pre-acquisition costs 6,705 5,216
Remaining Purchase Price 10,488 8,590
Land, not owned, under option agreements 12,107 8,590
Unconsolidated VIE [Member]
    
Land under option agreement [Line Items]    
Deposits and pre-acquisition costs 32,678 24,078
Remaining Purchase Price 683,158 360,495
Land, not owned, under option agreements 0 0
Other Land Option Agreements Member
    
Land under option agreement [Line Items]    
Deposits and pre-acquisition costs 48,561 40,822
Remaining Purchase Price 707,547 554,307
Land, not owned, under option agreements $ 15,505 $ 22,476