Real Estate Activity (Revenues, Costs And Expenses Associated With Consolidated Condominium Activities) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Real Estate Properties [Line Items]
Condominium revenues	$ 80,276	$ 73,531
Condominium costs and expenses	(59,049)	(56,457)
Income tax benefit	612
Net gains on sales of condominiums	6,904	744
Condominium Communities [Member]
Real Estate Properties [Line Items]
Condominium revenues	17,581	13,675
Condominium costs and expenses	(11,289)	(12,931)
Gains on sales of condominiums, before income taxes	6,292	744
Income tax benefit	612
Net gains on sales of condominiums	$ 6,904	$ 744