Investment In Unconsolidated Ventures - Summarized Balance Sheet Information (Detail) - USD ($) $ in Thousands		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Schedule of Equity Method Investments [Line Items]
Venture Assets		$ 203,754	$ 279,674
Venture Borrowings	[1]	85,133	128,288
Venture Equity		105,520	141,802
Investment in unconsolidated ventures		64,579	77,611	$ 82,453
242, LLC
Schedule of Equity Method Investments [Line Items]
Venture Assets	[2],[3]	19,525	26,503
Venture Borrowings	[2],[3]	0	1,107
Venture Equity	[2],[3]	19,357	23,136
Investment in unconsolidated ventures	[2],[3]	9,131	10,934
CL Ashton Woods
Schedule of Equity Method Investments [Line Items]
Venture Assets	[4]	124	2,653
Venture Borrowings	[4]	0	0
Venture Equity	[4]	104	2,198
Investment in unconsolidated ventures	[4]	83	1,107
CL Realty
Schedule of Equity Method Investments [Line Items]
Venture Assets		4,528	8,048
Venture Borrowings		0	0
Venture Equity		4,344	7,899
Investment in unconsolidated ventures		2,172	3,950
CREA FMF
Schedule of Equity Method Investments [Line Items]
Venture Assets	[2]	2,315	56,081
Venture Borrowings	[2]		37,446
Venture Equity	[2]	684	17,091
Investment in unconsolidated ventures	[2]	342	4,923
Elan 99 LLC
Schedule of Equity Method Investments [Line Items]
Venture Assets		49,080	49,652
Venture Borrowings			36,238
Venture Equity		11,204	13,100
Investment in unconsolidated ventures		10,078	11,790
FMF Littleton
Schedule of Equity Method Investments [Line Items]
Venture Assets		66,849	70,282
Venture Borrowings		45,836	44,446
Venture Equity		20,289	23,798
Investment in unconsolidated ventures		5,144	6,128
FMF Peakview
Schedule of Equity Method Investments [Line Items]
Venture Assets		0	0
Venture Borrowings		0	0
Venture Equity		0	0
Investment in unconsolidated ventures		0	0
FOR/SR Forsyth LLC
Schedule of Equity Method Investments [Line Items]
Venture Assets		11,598	10,672
Venture Borrowings		1,551	1,568
Venture Equity		10,041	8,990
Investment in unconsolidated ventures		9,037	8,091
HM Stonewall Estates
Schedule of Equity Method Investments [Line Items]
Venture Assets	[4]	0	852
Venture Borrowings	[4]	0	0
Venture Equity	[4]	0	852
Investment in unconsolidated ventures	[4]	0	477
LM Land Holdings
Schedule of Equity Method Investments [Line Items]
Venture Assets	[4]	19,479	25,538
Venture Borrowings	[4]	0	3,477
Venture Equity	[4]	12,074	20,945
Investment in unconsolidated ventures	[4]	5,935	9,685
MRECV DT Holdings LLC
Schedule of Equity Method Investments [Line Items]
Venture Assets		3,043	4,155
Venture Borrowings		0	0
Venture Equity		3,043	4,144
Investment in unconsolidated ventures		2,594	3,729
MRECV Edelweiss LLC/MRECV Lender VIII LLC
Schedule of Equity Method Investments [Line Items]
Venture Assets		8,127	3,484
Venture Borrowings		0	0
Venture Equity		8,127	3,484
Investment in unconsolidated ventures		7,189	3,358
MRECV Juniper Ridge LLC
Schedule of Equity Method Investments [Line Items]
Venture Assets	[5]	3,936	4,156
Venture Borrowings	[5]	0	0
Venture Equity	[5]	3,936	4,156
Investment in unconsolidated ventures	[5]	3,331	3,741
MRECV Meadow Crossing II LLC
Schedule of Equity Method Investments [Line Items]
Venture Assets		3,129	2,492
Venture Borrowings		0	0
Venture Equity		3,129	2,491
Investment in unconsolidated ventures		2,738	2,242
Miramonte Boulder Pass, LLC
Schedule of Equity Method Investments [Line Items]
Venture Assets	[5]	7,573	10,738
Venture Borrowings	[5]	1,398	4,006
Venture Equity	[5]	4,843	5,265
Investment in unconsolidated ventures	[5]	4,633	5,330
Temco
Schedule of Equity Method Investments [Line Items]
Venture Assets		4,448	4,368
Venture Borrowings		0	0
Venture Equity		4,345	4,253
Investment in unconsolidated ventures		2,172	2,126
Other Ventures
Schedule of Equity Method Investments [Line Items]
Venture Assets	[3]	0	0
Venture Borrowings	[3]	0	0
Venture Equity	[3]	0	0
Investment in unconsolidated ventures	[3]	0	$ 0
Nashville, Tennessee | Construction Loans | CREA FMF
Schedule of Equity Method Investments [Line Items]
Venture Borrowings	[2]	0
Houston, Texas | Construction Loans | Elan 99 LLC
Schedule of Equity Method Investments [Line Items]
Venture Borrowings		$ 36,348

[1] Total includes current maturities of $84,098,000 at year-end 2017, of which $79,515,000 is non-recourse to us, and $89,756,000 at year-end 2016, of which $78,557,000 is non-recourse to us.

[2] Includes unamortized deferred gains on real estate contributed by us to ventures. We recognize deferred gains as income as real estate is sold to third parties. Deferred gains of $548,000 are reflected as a reduction to our investment in unconsolidated ventures at year-end 2017.

[3] Our share of venture earnings in 2016 includes reallocation of prior year cumulative losses incurred by the venture as a result of equity contribution by the venture partner in 2016

[4] Includes unrecognized basis difference of $448,000 which is reflected as an increase of our investment in unconsolidated ventures at year-end 2017. This difference will be amortized as expense over the life of the investment and included in our share of earnings (loss) from the respective venture.

[5] Please read Note 22 - Subsequent Event for additional information regarding this transaction.