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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% |  |  |  |

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