Inventory - Recoverability Schedule of Inventory Assets Held for Development, by Reportable Segment (Details) $ in Thousands	Jun. 30, 2017 Community	Jun. 30, 2016 property	Jun. 30, 2016 Community	Jun. 30, 2016	Jun. 30, 2016 USD ($)
Real Estate Properties [Line Items]
Number of Communities on Watch List	3	7	7
Undiscounted Cash Flow Analyses Prepared, Number of Communities	0	3
Undiscounted Cash Flow Analyses Prepared, Pre-analysis Book Value (BV) | $					$ 48,232
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) | $					2,794
West Segment
Real Estate Properties [Line Items]
Number of Communities on Watch List | Community			4
Undiscounted Cash Flow Analyses Prepared, Number of Communities | Community			2
Undiscounted Cash Flow Analyses Prepared, Pre-analysis Book Value (BV) | $					22,969
Undiscounted Cash Flow Analyses Prepared, Aggregate Undiscounted Cash Flow as a Percentage of Book Value				124.00%
East Segment
Real Estate Properties [Line Items]
Number of Communities on Watch List | property		2
Undiscounted Cash Flow Analyses Prepared, Number of Communities		1	1
Undiscounted Cash Flow Analyses Prepared, Pre-analysis Book Value (BV) | $					22,469
Undiscounted Cash Flow Analyses Prepared, Aggregate Undiscounted Cash Flow as a Percentage of Book Value				88.50%
Southeast Segment
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%