REPORTING SEGMENTS - Summary of Assets by Segment (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Segment Reporting, Asset Reconciling Item [Line Items]
Real estate inventory and land deposits	$ 4,295,464	$ 4,038,494
Investments in unconsolidated entities	128,363	140,541
Other assets	916,033	1,085,406
Total assets	5,339,860	5,264,441
Operating Segments | East
Segment Reporting, Asset Reconciling Item [Line Items]
Real estate inventory and land deposits	2,025,102	1,862,756
Investments in unconsolidated entities	0	0
Other assets	170,692	162,339
Total assets	2,195,794	2,025,095
Operating Segments | Central
Segment Reporting, Asset Reconciling Item [Line Items]
Real estate inventory and land deposits	1,041,838	1,011,659
Investments in unconsolidated entities	37,408	35,476
Other assets	122,883	118,187
Total assets	1,202,129	1,165,322
Operating Segments | West
Segment Reporting, Asset Reconciling Item [Line Items]
Real estate inventory and land deposits	1,228,524	1,164,079
Investments in unconsolidated entities	86,682	100,693
Other assets	82,445	55,433
Total assets	1,397,651	1,320,205
Operating Segments | Financial Services
Segment Reporting, Asset Reconciling Item [Line Items]
Real estate inventory and land deposits	0	0
Investments in unconsolidated entities	4,015	4,015
Other assets	178,807	236,291
Total assets	182,822	240,306
Corporate and Unallocated
Segment Reporting, Asset Reconciling Item [Line Items]
Real estate inventory and land deposits	0	0
Investments in unconsolidated entities	258	357
Other assets	361,206	513,156
Total assets	$ 361,464	$ 513,513