Investment in Unconsolidated Ventures - Summarized Income Statement Information (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Schedule of Equity Method Investments [Line Items]
Revenues	$ 6,621	$ 33,774	$ 11,464	$ 50,146
Earnings (loss)	404	10,512	101	15,822
Equity in earnings of unconsolidated ventures	188	5,584	235	8,629
242, LLC
Schedule of Equity Method Investments [Line Items]
Revenues	0	12,368	0	17,699
Earnings (loss)	(164)	4,409	(464)	7,873
Equity in earnings of unconsolidated ventures	(82)	2,279	(232)	4,045
CL Ashton Woods
Schedule of Equity Method Investments [Line Items]
Revenues	993	1,061	1,689	2,411
Earnings (loss)	151	851	518	1,378
Equity in earnings of unconsolidated ventures	324	878	763	1,556
CL Realty
Schedule of Equity Method Investments [Line Items]
Revenues	113	190	246	469
Earnings (loss)	17	83	64	243
Equity in earnings of unconsolidated ventures	8	42	31	122
CREA FMF
Schedule of Equity Method Investments [Line Items]
Revenues	1,081	29	1,982	35
Earnings (loss)	(498)	(103)	(1,069)	(216)
Equity in earnings of unconsolidated ventures	(149)	(103)	(320)	(216)
Elan 99, LLC
Schedule of Equity Method Investments [Line Items]
Revenues	147	0	167	0
Earnings (loss)	(934)	0	(1,344)	(2)
Equity in earnings of unconsolidated ventures	(841)	0	(1,210)	(2)
FOR/SR Forsyth LLC
Schedule of Equity Method Investments [Line Items]
Revenues	0	0	0	0
Earnings (loss)	(17)	0	(17)	0
Equity in earnings of unconsolidated ventures	(15)	0	(15)	0
FMF Littleton
Schedule of Equity Method Investments [Line Items]
Revenues	526	0	847	0
Earnings (loss)	(178)	0	(348)	0
Equity in earnings of unconsolidated ventures	(44)	0	(86)	0
FMF Peakview
Schedule of Equity Method Investments [Line Items]
Revenues	0	466	939	652
Earnings (loss)	0	(252)	(248)	(734)
Equity in earnings of unconsolidated ventures	0	(50)	(50)	(146)
HM Stonewall Estates
Schedule of Equity Method Investments [Line Items]
Revenues	580	611	1,126	1,669
Earnings (loss)	294	297	514	812
Equity in earnings of unconsolidated ventures	124	343	227	573
LM Land Holdings
Schedule of Equity Method Investments [Line Items]
Revenues	2,026	4,321	3,026	6,297
Earnings (loss)	1,415	2,538	2,055	3,788
Equity in earnings of unconsolidated ventures	501	923	645	1,287
MRECV DT Holdings LLC
Schedule of Equity Method Investments [Line Items]
Revenues	119	0	217	0
Earnings (loss)	117	0	215	0
Equity in earnings of unconsolidated ventures	105	0	193	0
MRECV Edelweiss LLC
Schedule of Equity Method Investments [Line Items]
Revenues	94	0	181	0
Earnings (loss)	87	0	174	0
Equity in earnings of unconsolidated ventures	78	0	156	0
MREC VH Juniper Ridge LLC
Schedule of Equity Method Investments [Line Items]
Revenues	202	0	205	0
Earnings (loss)	203	0	206	0
Equity in earnings of unconsolidated ventures	183	0	186	0
MRECV Meadow Crossing II LLC
Schedule of Equity Method Investments [Line Items]
Revenues	29	0	29	0
Earnings (loss)	16	0	(18)	0
Equity in earnings of unconsolidated ventures	14	0	(17)
Miramonte Boulder Pass, LLC
Schedule of Equity Method Investments [Line Items]
Revenues	663	0	663	0
Earnings (loss)	(34)	(49)	(159)	(49)
Equity in earnings of unconsolidated ventures	(17)	(25)	(79)	(25)
PSW Communities
Schedule of Equity Method Investments [Line Items]
Revenues	0	13,642	0	16,069
Earnings (loss)	0	2,333	0	2,528
Equity in earnings of unconsolidated ventures	0	788	0	961
Temco
Schedule of Equity Method Investments [Line Items]
Revenues	48	1,086	147	1,144
Earnings (loss)	12	460	79	459
Equity in earnings of unconsolidated ventures	6	230	40	230
Other ventures
Schedule of Equity Method Investments [Line Items]
Revenues	0	0	0	3,701
Earnings (loss)	(83)	(55)	(57)	(258)
Equity in earnings of unconsolidated ventures	$ (7)	$ 279	$ 3	$ 244