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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, 2013
Dec. 31, 2012
Land under option agreement [Line Items]    
Deposits and pre-acquisition costs $ 88,499 $ 70,116
Remaining Purchase Price 1,300,069 923,392
Land, not owned, under option agreements 33,751 31,066
Consolidated VIE [Member]
    
Land under option agreement [Line Items]    
Deposits and pre-acquisition costs 8,523 5,216
Remaining Purchase Price 12,908 8,590
Land, not owned, under option agreements 14,526 8,590
Unconsolidated VIE [Member]
    
Land under option agreement [Line Items]    
Deposits and pre-acquisition costs 30,404 24,078
Remaining Purchase Price 629,823 360,495
Land, not owned, under option agreements 0 0
Other Land Option Agreements Member
    
Land under option agreement [Line Items]    
Deposits and pre-acquisition costs 49,572 40,822
Remaining Purchase Price 657,338 554,307
Land, not owned, under option agreements $ 19,225 $ 22,476