REPORTING SEGMENTS - Reconciliation to Net Income (Loss) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) segment	Mar. 31, 2019 USD ($)
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Number of reporting segments included in operating component | segment	3
Total revenues	$ 1,345,699	$ 925,092
Gross margin	197,756	172,040
Selling, general and administrative expenses	(136,853)	(103,883)
Equity in (loss)/income of unconsolidated entities	2,426	2,319
Interest and other income (expense), net (2)	(92,104)	(2,404)
Income/(loss) before income taxes	(28,775)	68,072
Operating Segments | East
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenues	423,392	354,952
Gross margin	58,017	61,176
Selling, general and administrative expenses	(36,339)	(35,559)
Equity in (loss)/income of unconsolidated entities	0	0
Interest and other income (expense), net (2)	15	(1,613)
Income/(loss) before income taxes	21,693	24,004
Operating Segments | Central
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenues	373,339	254,947
Gross margin	63,757	42,344
Selling, general and administrative expenses	(32,256)	(26,264)
Equity in (loss)/income of unconsolidated entities	(119)	(89)
Interest and other income (expense), net (2)	(2,252)	(807)
Income/(loss) before income taxes	29,130	15,184
Operating Segments | West
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenues	496,323	299,149
Gross margin	68,590	63,197
Selling, general and administrative expenses	(34,850)	(20,564)
Equity in (loss)/income of unconsolidated entities	334	821
Interest and other income (expense), net (2)	(7,264)	(389)
Income/(loss) before income taxes	26,810	43,065
Operating Segments | Financial Services
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenues	28,039	16,044
Gross margin	7,392	5,323
Selling, general and administrative expenses	0	0
Equity in (loss)/income of unconsolidated entities	2,230	1,409
Interest and other income (expense), net (2)	(1,400)	0
Income/(loss) before income taxes	8,222	6,732
Corporate and Unallocated
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenues	24,606	0
Gross margin	0	0
Selling, general and administrative expenses	(33,408)	(21,496)
Equity in (loss)/income of unconsolidated entities	(19)	178
Interest and other income (expense), net (2)	(81,203)	405
Income/(loss) before income taxes	$ (114,630)	$ (20,913)