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-Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29) -URI http://asc.fasb.org/extlink&oid=6589523&loc=d3e617274-123014 true2Total3true 4us-gaap_MortgageLoansOnRealEstateOtherRequiredDisclosuresAbstractus-gaap_truenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Credit Quality Monitoring4false 5nsre_MortgageLoansOnRealEstateNumberOfLoansContributingToMoreThan10PercentOfInterestIncomensre_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truefalsefalse00falsefalsefalse2falsefalsefalse00falsefalsefalsexbrli:integerItemTypeintegerRepresents the number of mortgage loans on real estate contributing to more than ten percent of interest income of the entity.No definition available.false256Number of CRE debt investments contributing to more than 10% of interest income5false 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