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Inventory - Recoverability Schedule of Inventory assets Held for Development, by Reportable Segment (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2013 Community | Mar. 31, 2012 Community
Real Estate Properties [Line Items] |  |
Number of Communities on Watch List | 1 | 20
Undiscounted Cash Flow Analysis - Number of Communities | 0 | 9
Undiscounted Cash Flow Analysis - Pre-analysis Book Value (BV) | $ 0 | $ 23,675
Undiscounted Cash Flow Analysis - Aggregate Undiscounted Cash Flow as a % of BV | 0.00% | 103.40%
West Segment |  |
Real Estate Properties [Line Items] |  |
Number of Communities on Watch List | 0 | 6
Undiscounted Cash Flow Analysis - Number of Communities | 0 | 4
Undiscounted Cash Flow Analysis - Pre-analysis Book Value (BV) | 0 | 8,550
Undiscounted Cash Flow Analysis - Aggregate Undiscounted Cash Flow as a % of BV |  | 103.70%
East Segment |  |
Real Estate Properties [Line Items] |  |
Number of Communities on Watch List | 1 | 12
Undiscounted Cash Flow Analysis - Number of Communities | 0 | 4
Undiscounted Cash Flow Analysis - Pre-analysis Book Value (BV) | 0 | 12,920
Undiscounted Cash Flow Analysis - Aggregate Undiscounted Cash Flow as a % of BV | 0.00% | 101.20%
Southeast Segment |  |
Real Estate Properties [Line Items] |  |
Number of Communities on Watch List | 0 | 2
Undiscounted Cash Flow Analysis - Number of Communities | 0 | 1
Undiscounted Cash Flow Analysis - Pre-analysis Book Value (BV) | 0 | 1,027
Undiscounted Cash Flow Analysis - Aggregate Undiscounted Cash Flow as a % of BV | 0.00% |
Unallocated & Other |  |
Real Estate Properties [Line Items] |  |
Number of Communities on Watch List | 0 | 0
Undiscounted Cash Flow Analysis - Number of Communities | 0 | 0
Undiscounted Cash Flow Analysis - Pre-analysis Book Value (BV) | $ 0 | $ 1,178

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