Real Estate Activity - Revenues Costs and Expenses Associated with Consolidated Condominium Activities (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Real Estate [Abstract]
Condominium revenues	$ 38,123	$ 2,442	$ 55,598
Condominium costs and expenses	(24,142)	(1,632)	(33,423)
Net gains on sales of condominiums	$ 13,981	$ 810	$ 22,175