Fair Value Measures and Other Financial Instruments - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended									12 Months Ended	1 Months Ended			12 Months Ended			12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011 Agreement	Dec. 31, 2010	Dec. 31, 2012 Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2011 Fair Value, Inputs, Level 2 [Member]	Dec. 31, 2012 Fixed Rate Debt [Member]	Dec. 31, 2011 Fixed Rate Debt [Member]	Dec. 31, 2012 Variable Rate Debt [Member]	Dec. 31, 2011 Variable Rate Debt [Member]	Dec. 31, 2011 Three Interest Rate Swap [Member]	Jan. 31, 2012 Fourth Interest Rate Swap [Member]	Dec. 31, 2012 Unsecured Bank Term Loan [Member]	Sep. 30, 2012 Unsecured Bank Term Loan [Member]	Dec. 31, 2010 Austin Condominium Project [Member]	Dec. 31, 2012 Austin Condominium Project [Member]	Dec. 31, 2010 Austin Condominium Project [Member] Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2010 Citrus Park Land Parcel [Member]	Dec. 31, 2010 Citrus Park Land Parcel [Member] Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2012 Atlanta Condominium Project [Member]	Dec. 31, 2010 Atlanta Condominium Project [Member] Fair Value, Inputs, Level 3 [Member]	Dec. 31, 2010 Atlanta Condominium Project [Member] Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Condominiums, for-sale and under construction	$ 23,281	$ 54,845													$ 14,433	$ 85,378			$ 8,848	$ 28,402
Impairment charge			35,091											34,691			400
Assets held for sale																		3,177
Indebtedness																					44,553
Number of interest rate swap agreements		3
Notional amounts										230,000	70,000
Derivative, fixed interest rate										1.55%	1.50%
LIBOR rate										One-month	One-month
Reduction in blended interest rate												3.24%	3.44%
Net liabilities				11,710	2,641
Accumulated comprehensive income (loss) to interest expense, future periods	3,993
Termination payment	11,847
Fair value of debt						860,217	885,455	298,551	137,495
Carrying value of debt						$ 802,464	$ 835,443	$ 300,000	$ 135,000