Inventory Additional Information (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2016 USD ($)	May 03, 2017 community lot
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Number of units in real estate property | lot					4,600
Number of communities | community					2
Number of lots, monetize | lot					400
Land-related charges - NRV Impairments Re acquisition writeoffs	$ 120,500		$ 120,500
Carrying amount impaired land-prior impairment	161,900		161,900
Write-offs of deposits and pre-acquisition costs	$ 5,063	$ 7,414	$ 6,718	$ 10,454
Minimum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate			18.00%
Maximum
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate			25.00%