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REAL ESTATE INVENTORY AND LAND DEPOSITS - Schedule of Development Status of Land Inventory (Detail) $ in Thousands	Sep. 30, 2018 project	Sep. 30, 2018 lot	Sep. 30, 2018 USD ($)	Dec. 31, 2017 USD ($) lot
Inventory [Line Items]
Owned Lots (in lot)	0	27,983		25,921
Book Value of Land and Development
Inventory [Line Items]
Raw			$ 286,753	$ 338,642
Partially developed			473,725	543,200
Finished			1,500,373	1,314,243
Long-term strategic assets			0	10,730
Total			$ 2,260,851	$ 2,206,815
Raw
Inventory [Line Items]
Owned Lots (in lot) \| lot		7,362		7,703
Partially developed
Inventory [Line Items]
Owned Lots (in lot) \| lot		7,639		5,811
Finished
Inventory [Line Items]
Owned Lots (in lot) \| lot		12,982		11,644
Long-term strategic assets
Inventory [Line Items]
Owned Lots (in lot) \| lot		0		763