Investment in Unconsolidated Ventures - Summarized Income Statement Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Schedule of Equity Method Investments [Line Items]
Revenues	$ 8,360	$ 16,372
Earnings (loss)	(235)	5,310
Equity in earnings of unconsolidated ventures	47	3,045
242, LLC
Schedule of Equity Method Investments [Line Items]
Revenues	0	5,331
Earnings (loss)	(300)	3,464
Equity in earnings of unconsolidated ventures	(150)	1,766
CL Ashton Woods
Schedule of Equity Method Investments [Line Items]
Revenues	696	1,350
Earnings (loss)	367	527
Equity in earnings of unconsolidated ventures	439	678
CL Realty
Schedule of Equity Method Investments [Line Items]
Revenues	133	279
Earnings (loss)	47	160
Equity in earnings of unconsolidated ventures	23	80
CREA FMF
Schedule of Equity Method Investments [Line Items]
Revenues	901	6
Earnings (loss)	(571)	(113)
Equity in earnings of unconsolidated ventures	(171)	(113)
Elan 99, LLC
Schedule of Equity Method Investments [Line Items]
Revenues	20	0
Earnings (loss)	(410)	(2)
Equity in earnings of unconsolidated ventures	(369)	(2)
FMF Littleton
Schedule of Equity Method Investments [Line Items]
Revenues	321	0
Earnings (loss)	(170)	0
Equity in earnings of unconsolidated ventures	(42)	0
FMF Peakview
Schedule of Equity Method Investments [Line Items]
Revenues	939	186
Earnings (loss)	(248)	(482)
Equity in earnings of unconsolidated ventures	(50)	(96)
FOR/SR Forsyth LLC
Schedule of Equity Method Investments [Line Items]
Revenues	0	0
Earnings (loss)	0	0
Equity in earnings of unconsolidated ventures	0	0
HM Stonewall Estates
Schedule of Equity Method Investments [Line Items]
Revenues	4,063	1,058
Earnings (loss)	220	515
Equity in earnings of unconsolidated ventures	103	230
LM Land Holdings
Schedule of Equity Method Investments [Line Items]
Revenues	1,000	1,976
Earnings (loss)	640	1,250
Equity in earnings of unconsolidated ventures	144	364
MRECV DT Holdings LLC
Schedule of Equity Method Investments [Line Items]
Revenues	98	0
Earnings (loss)	98	0
Equity in earnings of unconsolidated ventures	88	0
MRECV Edelweiss LLC
Schedule of Equity Method Investments [Line Items]
Revenues	87	0
Earnings (loss)	87	0
Equity in earnings of unconsolidated ventures	78	0
MREC VH Juniper Ridge LLC
Schedule of Equity Method Investments [Line Items]
Revenues	3	0
Earnings (loss)	3	0
Equity in earnings of unconsolidated ventures	3	0
MRECV Meadow Crossing II LLC
Schedule of Equity Method Investments [Line Items]
Revenues	0	0
Earnings (loss)	34	0
Equity in earnings of unconsolidated ventures	(31)	0
Miramonte Boulder Pass, LLC
Schedule of Equity Method Investments [Line Items]
Revenues	0	0
Earnings (loss)	(125)	0
Equity in earnings of unconsolidated ventures	(62)	0
PSW Communities
Schedule of Equity Method Investments [Line Items]
Revenues	0	2,427
Earnings (loss)	0	195
Equity in earnings of unconsolidated ventures	0	173
Temco
Schedule of Equity Method Investments [Line Items]
Revenues	99	58
Earnings (loss)	67	(1)
Equity in earnings of unconsolidated ventures	34	0
Other ventures
Schedule of Equity Method Investments [Line Items]
Revenues	0	3,701
Earnings (loss)	26	(203)
Equity in earnings of unconsolidated ventures	$ 10	$ (35)