Segment Information - Additional Information (Detail)							1 Months Ended	3 Months Ended				6 Months Ended		33 Months Ended
	Jul. 27, 2015 USD ($)	Jul. 10, 2015 USD ($)	Oct. 15, 2012 USD ($)	Aug. 03, 2012 USD ($)	Jun. 20, 2012 USD ($)	Mar. 13, 2012 USD ($)	Jun. 30, 2015 USD ($) Subscriber	Jun. 30, 2015 USD ($) Subscriber	Mar. 31, 2015 USD ($)	Jun. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Jun. 30, 2015 USD ($) Subscriber	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) Subscriber	Sep. 30, 2009 a Segment
Segment Reporting Information [Line Items]
Litigation charge regarding construction defects						$ 18,200,000
Other charges regarding construction defects						756,000
Litigation recoveries							$ 2,350,000	$ 2,350,000	$ 0	$ 16,000	$ 0	$ 2,350,000	$ 16,000	$ 3,169,000
Gold Peak [Member]
Segment Reporting Information [Line Items]
Number of units | Segment															259
Number of acres prior to sale | a															29
Litigation charge regarding construction defects						18,200,000
Other charges regarding construction defects						$ 756,000
Settlement with the plaintiff					$ 17,000,000
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
Subsequent Event [Member]
Segment Reporting Information [Line Items]
Payments received against accounts receivable	$ 1,960,000
Percentage collected from trade accounts receivable	36.70%
Litigation recoveries		$ 414,000
Reis Services [Member]
Segment Reporting Information [Line Items]
Percentage of Reis Service's revenue by major subscriber								18.40%		3.00%		10.80%	3.00%
Aggregate percentage of subscribers contributing largest share among accounts receivable							39.40%	39.40%				39.40%		39.40%
Number of subscribers contributing largest share among accounts receivable | Subscriber							8	8				8		8
Percentage of Reis Service's accounts receivable by major subscriber							18.50%	18.50%				18.50%		18.50%
Percentage of deferred revenue by major subscriber							6.70%	6.70%				6.70%		6.70%