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Inventory - Recoverability Schedule of Inventory Assets Held for Development, by Reportable Segment (Details) $ in Thousands | Mar. 31, 2017 Community | Mar. 31, 2016 property | Mar. 31, 2016 Community | Mar. 31, 2016 | Mar. 31, 2016 USD ($)
--- | --- | --- | --- | --- | ---
Real Estate Properties [Line Items] |  |  |  |  |
Number of Communities on Watch List | 6 | 9 | 2 |  |
Undiscounted Cash Flow Analyses Prepared, Number of Communities | 0 | 2 |  |  |
Undiscounted Cash Flow Analyses Prepared, Pre-analysis Book Value (BV) | $ |  |  |  |  | $ 21,914
Corporate and unallocated |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of Communities on Watch List | property |  | 0 |  |  |
Undiscounted Cash Flow Analyses Prepared, Number of Communities | property |  | 0 |  |  |
Undiscounted Cash Flow Analyses Prepared, Pre-analysis Book Value (BV) | $ |  |  |  |  | 1,105
West Segment |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of Communities on Watch List | Community | 5 |  |  |  |
West Segment | Operating Segments |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of Communities on Watch List | Community |  |  | 8 |  |
Undiscounted Cash Flow Analyses Prepared, Number of Communities | Community |  |  | 2 |  |
Undiscounted Cash Flow Analyses Prepared, Pre-analysis Book Value (BV) | $ |  |  |  |  | 20,809
Undiscounted Cash Flow Analyses Prepared, Aggregate Undiscounted Cash Flow as a Percentage of Book Value |  |  |  | 108.00% |
East Segment |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of Communities on Watch List | Community | 1 |  |  |  |
East Segment | Operating Segments |  |  |  |  |
Real Estate Properties [Line Items] |  |  |  |  |
Number of Communities on Watch List | property |  | 1 |  |  |
Undiscounted Cash Flow Analyses Prepared, Number of Communities | property |  | 0 |  |  |
Undiscounted Cash Flow Analyses Prepared, Pre-analysis Book Value (BV) | $ |  |  |  |  | $ 0
Undiscounted Cash Flow Analyses Prepared, Aggregate Undiscounted Cash Flow as a Percentage of Book Value |  |  |  | 0.00% |

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