Inventory (Summary of Interests in Land Option Agreements) (Details) - USD ($) $ in Thousands |
Jun. 30, 2018 |
Dec. 31, 2017 |
---|---|---|
Variable Interest Entity [Line Items] | ||
Deposits and Pre-acquisition Costs | $ 218,437 | $ 207,987 |
Remaining Purchase Price | 2,749,086 | 2,462,579 |
Land options with VIEs | ||
Variable Interest Entity [Line Items] | ||
Deposits and Pre-acquisition Costs | 73,940 | 78,889 |
Remaining Purchase Price | 1,145,136 | 977,480 |
Other land options | ||
Variable Interest Entity [Line Items] | ||
Deposits and Pre-acquisition Costs | 144,497 | 129,098 |
Remaining Purchase Price | $ 1,603,950 | $ 1,485,099 |