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Inventory - Recoverability Schedule of Inventory assets Held for Development, by Reportable Segment (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Sep. 30, 2013 Community | Sep. 30, 2012 Community | Sep. 30, 2011 Community
Real Estate Properties [Line Items] |  |  |
Number of Communities on Watch List | 5 | 31 | 30
Undiscounted Cash Flow Analysis - Number of Communities | 5 | 19 | 23
Undiscounted Cash Flow Analysis - Pre-analysis Book Value (BV) | $ 27,680 | $ 72,959 | $ 96,008
Undiscounted Cash Flow Analysis - Aggregate Undiscounted Cash Flow as a % of BV | 114.90% | 96.70% | 87.70%
Unallocated |  |  |
Real Estate Properties [Line Items] |  |  |
Number of Communities on Watch List | 0 | 0 | 1
Undiscounted Cash Flow Analysis - Number of Communities | 0 | 0 | 0
Undiscounted Cash Flow Analysis - Pre-analysis Book Value (BV) | 1,755 | 5,193 | 9,707
Undiscounted Cash Flow Analysis - Aggregate Undiscounted Cash Flow as a % of BV | 100.00% | 100.00% | 100.00%
Continuing Operations | West |  |  |
Real Estate Properties [Line Items] |  |  |
Number of Communities on Watch List | 1 | 14 | 18
Undiscounted Cash Flow Analysis - Number of Communities | 1 | 8 | 15
Undiscounted Cash Flow Analysis - Pre-analysis Book Value (BV) | 11,080 | 28,467 | 58,848
Undiscounted Cash Flow Analysis - Aggregate Undiscounted Cash Flow as a % of BV | 117.60% | 94.70% | 88.40%
Continuing Operations | East |  |  |
Real Estate Properties [Line Items] |  |  |
Number of Communities on Watch List | 3 | 12 | 7
Undiscounted Cash Flow Analysis - Number of Communities | 3 | 8 | 5
Undiscounted Cash Flow Analysis - Pre-analysis Book Value (BV) | 9,588 | 30,052 | 16,436
Undiscounted Cash Flow Analysis - Aggregate Undiscounted Cash Flow as a % of BV | 107.00% | 91.80% | 94.60%
Continuing Operations | Southeast |  |  |
Real Estate Properties [Line Items] |  |  |
Number of Communities on Watch List | 1 | 5 | 4
Undiscounted Cash Flow Analysis - Number of Communities | 1 | 3 | 3
Undiscounted Cash Flow Analysis - Pre-analysis Book Value (BV) | $ 5,257 | $ 9,247 | $ 11,017
Undiscounted Cash Flow Analysis - Aggregate Undiscounted Cash Flow as a % of BV | 128.60% | 116.50% | 60.30%

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