Segment Information - Additional Information (Detail) $ in Thousands					1 Months Ended	3 Months Ended	6 Months Ended		39 Months Ended
	Oct. 15, 2012 USD ($)	Aug. 03, 2012 USD ($)	Jun. 20, 2012 USD ($)	Mar. 13, 2012 USD ($)	Jul. 28, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2016 Subscriber	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2009 a Segment
Segment Reporting Information [Line Items]
Litigation recoveries						$ 2,350		$ 2,350	$ 5,658
Gold Peak [Member]
Segment Reporting Information [Line Items]
Number of units prior to sale | Segment										259
Number of acres prior to sale | a										29
Litigation charge regarding construction defects				$ 18,200
Other charges regarding construction defects				$ 756
Settlement with the plaintiff			$ 17,000
Gold Peak [Member] | First Installment [Member]
Segment Reporting Information [Line Items]
Installment amount due		$ 5,000
Installment due date							Aug. 03, 2012
Gold Peak [Member] | Second Installment [Member]
Segment Reporting Information [Line Items]
Installment amount due	$ 12,000
Installment due date							Oct. 15, 2012
Subsequent Event [Member]
Segment Reporting Information [Line Items]
Payments received against accounts receivable					$ 4,443
Percentage collected from trade accounts receivable					65.10%
Reis Services [Member]
Segment Reporting Information [Line Items]
Percentage of Reis Service's revenue by major subscriber							8.10%	10.80%
Number of subscribers contributing largest share among accounts receivable | Subscriber							10
Aggregate percentage of subscribers contributing largest share among accounts receivable							51.20%
Percentage of Reis Service's accounts receivable by major subscriber							30.10%
Percentage of deferred revenue by major subscriber							8.60%