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Stockholders' Equity Equity Offering (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended
Jul. 30, 2015
Jul. 23, 2015
Jul. 01, 2015
Equity [Abstract]      
Common Stock, Shares, Issued     17,000,000
Share Price     $ 10.00
AdditionalPurchaseOptionPeriod 30-day    
CommonSharesGrantedToUnderwritersToCoverOver-Allotments     841,500
CommonSharesSoldPursuantToUnderwritersOption   444,897  
ProceedsFromIssuanceOfCommonSharesNetOfUnderwritingFeesAndOfferingCosts $ 170.0