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, 2012	Jun. 30, 2013	Jun. 30, 2012
Real Estate [Abstract]
Condominium revenues	$ 38,123	$ 22,945	$ 55,598	$ 40,526
Condominium costs and expenses	(24,142)	(14,415)	(33,423)	(25,704)
Net gains on sales of residential condominiums, before income tax	13,981	8,530	22,175	14,822
Income tax benefit				612
Net gains on sales of condominiums	$ 13,981	$ 8,530	$ 22,175	$ 15,434