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Organization and Investment Objective Organization and Investment Objective (Details) (USD $)
 0 Months Ended 9 Months Ended 0 Months Ended
Sep. 30, 2012
Sep. 30, 2013
May 01, 2013
May 01, 2013
Common Stock [Member]
May 01, 2013
Private Placement [Member]
Common Stock [Member]
May 01, 2013
IPO [Member]
Common Stock [Member]
Private Placement and Initial Public Offering [Line Items]            
Stock Issued During Period, Shares, New Issues         1,050,000 6,450,000
Share price         $ 20.00 $ 20.00
Stock Issued During Period, Value, New Issues $ 31,500,000 $ 150,000,000   $ 150,000,000 $ 21,000,000.0  
Remaining Capital Commitment     0      
Proceeds from issuance of common shares       $ 148,500,000    
Required Distribution of Taxable Net Income, Percentage on Annual Basis   90.00%        
Intended Distribution of Taxable Net Income, Percentage on Annual Basis   100.00%