Commitments and Contingencies - Additional Information (Detail) (USD $)	0 Months Ended		1 Months Ended	3 Months Ended		12 Months Ended				0 Months Ended
	Nov. 20, 2014	Mar. 13, 2012	Oct. 31, 2011	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2014 Lease	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Jun. 20, 2012	Aug. 03, 2012	Oct. 15, 2012	Sep. 30, 2009 Segment
Loss Contingencies [Line Items]
Construction defect suit filed against the company			$ 19,000,000
Amount of liability through verdict by jury		18,200,000
Other costs associated with judgment		756,000
Additional charge recorded by Company in discontinued operations as a result of the verdict					14,216,000	0	0	12,260,000	4,460,000
Estimated litigation liability									7,740,000
Amount not probable to be received from insurance company					3,000,000				3,000,000
Reversal of litigation charge				1,956,000
Litigation recoveries						26,000	80,000	713,000
Amount of cover available for claim through insurance policy as per ACE						3,000,000
Lawsuit could have been settled						12,000,000
Amount of coverage determined by court	3,000,000
Number of operating leases						3
Rent expense						2,082,000	1,893,000	1,793,000
Letter of credit requirement						212,000
Contributions percentage of employees' salary						2.00%	2.00%	2.00%
Percentage of employees' contribution						50.00%	50.00%	50.00%
Capped percentage of employees' salary						4.00%	4.00%	4.00%
Company contributions						231,000	203,000	159,000
Midtown Manhattan [Member]
Loss Contingencies [Line Items]
Number of operating leases						2
Lease expiration date						Sep. 30, 2016
White Plains [Member]
Loss Contingencies [Line Items]
Number of operating leases						1
Lease expiration date						Sep. 30, 2019
Minimum [Member]
Loss Contingencies [Line Items]
Amount of cover available for claim through insurance policy						9,000,000
Maximum [Member]
Loss Contingencies [Line Items]
Amount of cover available for claim through insurance policy						12,000,000
Gold Peak [Member]
Loss Contingencies [Line Items]
Former Gold Peak condominium project unit													259
Amount of liability through verdict by jury		18,200,000
Other costs associated with judgment		756,000
Additional charge recorded by Company in discontinued operations as a result of the verdict					14,216,000			12,260,000
Settlement with the plaintiff										17,000,000
Reversal of litigation charge				1,956,000
Litigation recoveries						26,000	80,000	713,000
Gold Peak [Member] | First Installment [Member]
Loss Contingencies [Line Items]
Installment amount due											5,000,000
Installment due date						Aug. 03, 2012
Gold Peak [Member] | Second Installment [Member]
Loss Contingencies [Line Items]
Installment amount due												$ 12,000,000
Installment due date						Oct. 15, 2012