REAL ESTATE INVENTORY AND LAND DEPOSITS - Schedule of Development Status of Land Inventory (Details) $ in Thousands	Mar. 31, 2020 USD ($) lot	Dec. 31, 2019 USD ($) lot
Inventory [Line Items]
Owned Lots (in lot) \| lot	55,553	42,606
Book Value of Land and Development
Inventory [Line Items]
Raw \| $	$ 563,228	$ 477,997
Partially developed \| $	1,302,211	914,689
Finished \| $	2,352,418	1,559,291
Total \| $	$ 4,217,857	$ 2,951,977
Raw
Inventory [Line Items]
Owned Lots (in lot) \| lot	17,449	13,804
Partially developed
Inventory [Line Items]
Owned Lots (in lot) \| lot	16,741	13,298
Finished
Inventory [Line Items]
Owned Lots (in lot) \| lot	21,363	15,504

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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The number of real estate properties owned as of the balance sheet date.

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