Debt - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Sep. 30, 2012
Line of Credit Facility [Line Items]
Debt	$ 345,412,000		$ 357,407,000
Deferred Finance Costs, Net	6,995,000			7,896,000
Amortization of deferred financing fees	901,000	829,000
Senior secured credit facility [Member]
Line of Credit Facility [Line Items]
Percentage of spread on federal funds effective rate	0.50%
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity under term Loan facility	200,000,000
Austin, Texas [Member]
Line of Credit Facility [Line Items]
Guest room hotel	413
Carrying value of multifamily project to secure non recourse loan	27,658,000
Austin, Texas [Member] | Multi Family Property [Member]
Line of Credit Facility [Line Items]
Multifamily project	257
Term loan facility [Member] | Senior secured credit facility [Member]
Line of Credit Facility [Line Items]
Maturity period of revolving line of credit	Sep. 14, 2017
Convertible Debt [Member]
Line of Credit Facility [Line Items]
Debt	100,716,000		99,890,000
Secured Debt [Member]
Line of Credit Facility [Line Items]
Debt	15,400,000		15,400,000
Secured Debt [Member] | Austin, Texas [Member]
Line of Credit Facility [Line Items]
Debt	15,400,000
Other indebtedness [Member]
Line of Credit Facility [Line Items]
Debt	6,095,000		16,498,000
Carrying value of property to secure borrowing	21,387,000
Senior Notes [Member] | Senior secured credit facility [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity under term Loan facility	300,000,000
Secured Debt [Member] | Senior secured credit facility [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity under term Loan facility	200,000,000
Senior secured credit facility [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Maturity period of revolving line of credit	Sep. 14, 2015
Net unused borrowing capacity	140,031,000
Senior secured credit facility [Member] | Term loan facility [Member]
Line of Credit Facility [Line Items]
Debt	200,000,000		200,000,000
Letter of Credit [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Maximum borrowing capacity under term Loan facility	100,000,000
Sublimit for letters of credit outstanding	$ 3,705,000
Convertible Debt [Member]
Line of Credit Facility [Line Items]
Interest Rate Percentage	3.75%
London Interbank Offered Rate (LIBOR) [Member] | Senior secured credit facility [Member]
Line of Credit Facility [Line Items]
Debt instrument basis spread over variable rate	4.00%
Base Rate [Member] | Senior secured credit facility [Member]
Line of Credit Facility [Line Items]
Percentage Of Variable Spread On Base Rate	3.00%
30 day LIBOR rate [Domain] | Senior secured credit facility [Member]
Line of Credit Facility [Line Items]
Debt instrument basis spread over variable rate	1.00%