Taxes - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Taxes [Line Items]
Percentage of taxable income required to distribute annually to maintain REIT qualification, (in hundredths)	90.00%		90.00%
Income tax provision (benefit)	$ (1,000)	$ (13,000)	$ 16,000	$ 30,000
Federal and State Income Taxes
Income Taxes [Line Items]
Federal and state deferred tax asset	10,300,000		10,300,000
Federal and state deferred tax asset, valuation allowance	$ 10,100,000		$ 10,100,000