Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity (Details Textual)

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Stockholders' Equity (Details Textual) (USD $)
In Millions, except Share data, unless otherwise specified
 3 Months Ended 1 Months Ended 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Dec. 31, 2012
Jan. 31, 2013
IPO [Member]
Mar. 31, 2013
IPO [Member]
Mar. 31, 2013
Common Stock [Member]
Jan. 31, 2013
Common Stock [Member]
Stockholder's Equity (Textual) [Abstract]              
IPO of shares of common stock       3,333,334      
Public offering price             $ 15.00
Net proceeds after deducting offering expenses           $ 45.1  
Underwriters exercised their option to purchase an additional shares         446,930    
Additional gross proceeds from IPO         6.7    
Additional net proceeds from IPO         6.2    
Stockholder's Equity (Additional Textual) [Abstract]              
Gross proceeds from IPO 50.0            
Dividend declared or paid   $ 0.00          
Non-REIT accumulated earnings and profits     9.1        
Deferred intercompany gain from land transfer $ 4.0