Inventory (Summary of Interests in Land Option Agreements) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Deposits and Pre-acquisition Costs	$ 423,112	$ 404,922
Remaining Purchase Price	6,019,747	5,457,878
Land options with VIEs
Variable Interest Entity [Line Items]
Deposits and Pre-acquisition Costs	185,789	179,604
Remaining Purchase Price	2,577,792	2,329,187
Other land options
Variable Interest Entity [Line Items]
Deposits and Pre-acquisition Costs	237,323	225,318
Remaining Purchase Price	$ 3,441,955	$ 3,128,691