Debt - Additional Information (Detail)			12 Months Ended
	Nov. 27, 2013 USD ($) shares Unit $ / shares $ / Unit	Feb. 26, 2013 USD ($)	Dec. 31, 2015 USD ($) Property Room $ / shares		Dec. 31, 2014 USD ($) Property $ / shares	Dec. 31, 2013 USD ($)	Apr. 01, 2016	Mar. 31, 2016	Sep. 30, 2015
Line of Credit Facility [Line Items]
NetIncomePercentageRequiredforNetWorthCompliance			75.00%
MinimumNetWorthPercentageRequiredForCompliance			85.00%
Common stock, par value | $ / shares			$ 1.00		$ 1.00
Debt			$ 389,782,000		$ 432,744,000
Repayments of Long-term Debt			58,220,000		225,481,000	$ 106,076,000
Deferred Finance Costs, Net			11,034,000		15,168,000
Amortization of deferred financing fees			4,002,000		$ 3,845,000	$ 3,050,000
Debt Maturities 2016			27,973,000
Debt Maturities 2017			551,000
Debt Maturities 2018			23,936,000
Debt Maturities 2019			0
Debt Maturities 2020			106,762,000
Debt Maturities thereafter			$ 230,560,000
Austin [Member]
Line of Credit Facility [Line Items]
Guest room hotel | Room			413
Multi Family Property [Member] | Austin, Texas [Member]
Line of Credit Facility [Line Items]
Number Of Units Of Multifamily Project | Property			257		257
Carrying value					$ 53,917,000
Multi Family Development Properties [Member] | Texas [Member]
Line of Credit Facility [Line Items]
Carrying value			$ 51,035,000
6% Tangible Equity Units [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Face Amount	$ 150,000,000
Units issued | Unit	6,000,000
Exercise price of unit | $ / Unit	25.00
Common stock, par value | $ / shares	$ 1.00
Interest rate percentage	6.00%
Debt			8,768,000		17,154,000
Revolving Line of Credit [Member] | Sublimit For Letters Of Credit [Member]
Line of Credit Facility [Line Items]
Sublimit for letters of credit under line of credit facility			100,000,000
Term Loan Facility [Member] | Senior Secured Credit Facility [Member]
Line of Credit Facility [Line Items]
Debt					200,000,000
Letter of Credit [Member]
Line of Credit Facility [Line Items]
Sublimit for letters of credit outstanding			15,899,000
Convertible Debt [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Face Amount		$ 125,000,000
Debt Instrument, Maturity Date		Mar. 01, 2020
Interest rate percentage		3.75%
Initial conversion rate		40.8351
Principal amount of initial conversion rate		$ 1,000
Unamortized debt discount			18,238,000
Debt			$ 106,762,000		103,194,000
Senior Notes [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Maturity Date		Jun. 01, 2022
Interest rate percentage			8.50%
Debt			$ 230,560,000		250,000,000
Notes Reduction			$ 19,440,000
Debt Instrument, Redemption Price, Percentage			97.00%
Gains (Losses) on Extinguishment of Debt, before Write off of Deferred Debt Issuance Cost			$ 589,000
Write off of Deferred Debt Issuance Cost			$ 506,000
Senior Notes [Member] | 6% Tangible Equity Units [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Expiration Date			Dec. 15, 2016
Face amount per unit, debt | $ / Unit	4.2522
Interest rate percentage	4.50%
Secured Promissory Notes [Member]
Line of Credit Facility [Line Items]
Debt			$ 15,400,000		15,400,000
Secured Promissory Notes [Member] | Austin [Member]
Line of Credit Facility [Line Items]
Carrying value of multifamily project to secure non recourse loan			33,621,000
Other Indebtedness [Member]
Line of Credit Facility [Line Items]
Debt			28,292,000		46,996,000
Other Indebtedness [Member] | Multi Family Property [Member] | Austin, Texas [Member]
Line of Credit Facility [Line Items]
Debt			23,936,000
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Minimum liquidity required			$ 125,000,000
Minimum effective leverage ratio exceeded			40.00%
Debt Instrument, Stockholders Distribution Covenant, Interest Coverage Ratio			3.0
Maximum borrowing capacity under term Loan facility			$ 300,000,000
Line of Credit Facility, Expiration Date			May 15, 2017
Net unused borrowing capacity			$ 284,101,000
Percentage Of Spread On Federal Funds Effective Rate			0.50%
Minimum Net Worth Required for Compliance			$ 379,044,000
Debt Instrument, Covenant, Interest Coverage Ratio			2.25						2.50
Payments of Capital Distribution			$ 50,000,000
Debt Instrument, Distribution Funding, Percentage From Sales of Properties and Non-core Assets			65.00%
Minimum [Member] | 6% Tangible Equity Units [Member]
Line of Credit Facility [Line Items]
Units issued | shares	6,547,800
Maximum [Member] | 6% Tangible Equity Units [Member]
Line of Credit Facility [Line Items]
Units issued | shares	7,857,000
Over-Allotment Option [Member] | 6% Tangible Equity Units [Member]
Line of Credit Facility [Line Items]
Units issued | Unit	600,000
London Interbank Offered Rate (LIBOR) [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate			4.00%
Base Rate [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Percentage Of Variable Spread On Base Rate			3.00%
Thirty Day LIBOR Rate [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate			1.00%
Midtown [Member]
Line of Credit Facility [Line Items]
Number Of Units Of Multifamily Project | Property			354
Proceeds from sale of multifamily property			$ 18,473,000
Carrying value			0	[1]	$ 33,293,000
Repayments of Long-term Debt			$ 24,166,000
Scenario, Forecast [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Covenant, Interest Coverage Ratio							2.50	2.25

[1] Sold in 2015.