Segment Information - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended		12 Months Ended				2 Months Ended	0 Months Ended
	Mar. 13, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Feb. 27, 2015	Jun. 20, 2012	Aug. 03, 2012	Oct. 15, 2012	Sep. 30, 2009 acre Segment
Segment Reporting Information [Line Items]
Litigation charge regarding construction defects	$ 18,200,000
Other charges regarding construction defects	756,000
Litigation charge			14,216,000	0	0	12,260,000	4,460,000
Reversal of litigation charge		1,956,000
Litigation recoveries				26,000	80,000	713,000
Subsequent Event [Member]
Segment Reporting Information [Line Items]
Payments received against accounts receivable								9,773,000
Percentage collected from trade accounts receivable								77.10%
Gold Peak [Member]
Segment Reporting Information [Line Items]
Number of units												259
Number of acres prior to sale												29
Litigation charge regarding construction defects	18,200,000
Other charges regarding construction defects	756,000
Litigation charge			14,216,000			12,260,000
Reversal of litigation charge		1,956,000
Settlement with the plaintiff									17,000,000
Litigation recoveries				26,000	80,000	713,000
Gold Peak [Member] | First Installment [Member]
Segment Reporting Information [Line Items]
Installment amount due										5,000,000
Installment due date				Aug. 03, 2012
Gold Peak [Member] | Second Installment [Member]
Segment Reporting Information [Line Items]
Installment amount due											$ 12,000,000
Installment due date				Oct. 15, 2012
Reis Services [Member]
Segment Reporting Information [Line Items]
Percentage of Reis Service's revenue by major subscriber				2.90%	3.40%	4.20%
Aggregate percentage of subscribers contributing largest share among accounts receivable				65.00%	59.10%
Number of subscribers contributing largest share among accounts receivable				31	25
Number of subscribers contributing largest share among major accounts receivable				4	4
Percentage of accounts receivable accounted for by major subscribers				4.00%	4.00%
Percentage of Reis Service's accounts receivable by major subscriber				9.40%	10.40%
Percentage of deferred revenue by major subscriber				5.20%	5.90%