Equity-Based Compensation (Details) (USD $) In Millions, except Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2012
Equity-based compensation
Gross offering proceeds required to be raised from persons not affiliated with the entity in order to obligate the entity to reimburse organization and offering costs	$ 2.0
Stock options
Equity-based compensation
Percentage of outstanding shares of the entity's common stock that can be issued on the date of grant, maximum	10.00%
Restricted stock
Equity-based compensation
Number of shares to be granted to each independent director upon the Company raising the minimum amount of gross offering proceeds from persons not affiliated with the Company or its Advisor	5,000