Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended								12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Internal Revenue Service [Member]	Dec. 31, 2013 Total Capital Loss Carryforwards [Member]	Dec. 31, 2013 Capital Loss Carryforwards Expiring 2014 [Member]	Dec. 31, 2013 Capital Loss Carryforwards Expiring 2015 [Member]	Dec. 31, 2013 Capital Loss Carryforwards Expiring 2017 [Member]	Dec. 31, 2013 REIT [Member]	Dec. 31, 2012 REIT [Member]	May 31, 2013 Class A Common Stock [Member]
Tax Credit Carryforward [Line Items]
Annual distribution of net taxable income for U.S. federal income tax not to apply to our earnings that we distribute (percent)	90.00%
Net taxable income subject to distribution (percent)	100.00%
Excise tax rate	4.00%
Income tax provision	$ 995,000	$ 174,000	$ 1,425,000						$ 995,000	$ 174,000
Common stock, shares issued	28,802,000	2,927,000									25,875,000
Net operating loss carried forward	158,400,000
Net capital losses carried forward					48,000,000	16,000,000	31,400,000	602,000
NOLs expiration date	Expire in 2029
Net operating losses and net capital losses				$ 2,000,000