REPORTING SEGMENTS - Reconciliation to Net Income (Loss) (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($) segment	Sep. 30, 2017 USD ($)
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	$ 1,036,379	$ 908,027	$ 2,769,540	$ 2,585,611
Gross margin	198,999	171,318	520,812	484,431
Selling, general and administrative expenses	(100,520)	(94,850)	(287,601)	(279,005)
Equity in income of unconsolidated entities	2,514	2,787	9,777	6,943
Interest and other (expense)/income, net	(128)	(280)	(3,600)	(514)
Income/(loss) before income taxes	100,865	78,975	239,388	211,855
Operating Segments | East
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenues	393,476	312,539	1,038,756	896,258
Gross margin	70,427	63,188	187,844	185,534
Selling, general and administrative expenses	(32,182)	(28,469)	(91,920)	(84,975)
Equity in income of unconsolidated entities	137	0	378	0
Interest and other (expense)/income, net	(247)	(7)	(846)	(220)
Income/(loss) before income taxes	38,135	34,712	95,456	100,339
Operating Segments | Central
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenues	277,441	256,842	789,665	730,659
Gross margin	47,715	47,797	141,994	133,418
Selling, general and administrative expenses	(25,612)	(25,108)	(74,015)	(72,533)
Equity in income of unconsolidated entities	196	693	951	751
Interest and other (expense)/income, net	204	(87)	(34)	171
Income/(loss) before income taxes	22,503	23,295	68,896	61,807
Operating Segments | West
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenues	348,421	321,167	893,606	911,332
Gross margin	74,267	54,924	175,108	148,991
Selling, general and administrative expenses	(20,630)	(19,087)	(56,256)	(56,994)
Equity in income of unconsolidated entities	1,309	924	3,879	1,526
Interest and other (expense)/income, net	84	46	2	(146)
Income/(loss) before income taxes	55,030	36,807	122,733	93,377
Operating Segments | Financial Services
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenues	17,041	17,479	47,513	47,362
Gross margin	6,590	5,409	15,866	16,488
Selling, general and administrative expenses	0	0	0	0
Equity in income of unconsolidated entities	872	1,170	4,569	4,666
Interest and other (expense)/income, net	0	0	0	0
Income/(loss) before income taxes	7,462	6,579	20,435	21,154
Corporate and Unallocated
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Total revenues	0	0	0	0
Gross margin	0	0	0	0
Selling, general and administrative expenses	(22,096)	(22,186)	(65,410)	(64,503)
Equity in income of unconsolidated entities	0	0	0	0
Interest and other (expense)/income, net	(169)	(232)	(2,722)	(319)
Income/(loss) before income taxes	$ (22,265)	$ (22,418)	$ (68,132)	$ (64,822)