Inventory - Recoverability Schedule of Inventory assets Held for Development, by Reportable Segment (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2012 Communities	Jun. 30, 2011 Communities
Real Estate Properties [Line Items]
Number of Communities on Watch List	12	13
Undiscounted Cash Flow Analysis - Number of Communities	3	7
Undiscounted Cash Flow Analysis - Pre-analysis Book Value (BV)	$ 17,655	$ 21,633
Undiscounted Cash Flow Analysis - Aggregate Undiscounted Cash Flow as a % of BV	72.40%	81.60%
West Segment
Real Estate Properties [Line Items]
Number of Communities on Watch List	5	8
Undiscounted Cash Flow Analysis - Number of Communities	1	4
Undiscounted Cash Flow Analysis - Pre-analysis Book Value (BV)	6,196	5,079
Undiscounted Cash Flow Analysis - Aggregate Undiscounted Cash Flow as a % of BV	81.30%	86.50%
East Segment
Real Estate Properties [Line Items]
Number of Communities on Watch List	4	4
Undiscounted Cash Flow Analysis - Number of Communities	1	2
Undiscounted Cash Flow Analysis - Pre-analysis Book Value (BV)	7,144	9,731
Undiscounted Cash Flow Analysis - Aggregate Undiscounted Cash Flow as a % of BV	57.10%	96.50%
Southeast Segment
Real Estate Properties [Line Items]
Number of Communities on Watch List	3	1
Undiscounted Cash Flow Analysis - Number of Communities	1	1
Undiscounted Cash Flow Analysis - Pre-analysis Book Value (BV)	3,087	5,259
Undiscounted Cash Flow Analysis - Aggregate Undiscounted Cash Flow as a % of BV	79.00%	44.00%
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)	$ 1,228	$ 1,564