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Summary of Significant Accounting Policies (Schedule Of The Company's Interests In Land Option Agreements) (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Land under option agreement [Line Items]    
Deposits and Pre-acquisition Costs $ 162,119 $ 127,280
Remaining Purchase Price 2,046,193 1,890,585
Consolidated and Unconsolidated VIEs [Member]    
Land under option agreement [Line Items]    
Deposits and Pre-acquisition Costs 77,641 56,039
Remaining Purchase Price 1,064,506 891,506
Other Land Option Agreements Member    
Land under option agreement [Line Items]    
Deposits and Pre-acquisition Costs 84,478 71,241
Remaining Purchase Price $ 981,687 $ 999,079