Summary of Significant Accounting Policies (Details 2) (USD $)	53 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2014 Interest rate floor interestratefloor	Jun. 30, 2014 NS Real Estate Income Trust Advisor, LLC	Jun. 30, 2014 NS Real Estate Income Trust Advisor, LLC Maximum
Derivatives
Number of contracts (interest rate floor)		1
Fair value		$ 4,600,000
Notional amount		225,000,000.0
Related Party Arrangements
Percentage of gross offering proceeds from the Primary Offering reimbursable as organization and offering costs (percent)				15.00%
Expected reimbursable organization and offering costs, excluding selling commissions and dealer manager fee				15,000,000.0
Expected reimbursable organization and offering costs, excluding selling commissions and dealer manager fee, as a percentage of total proceeds available to be raised from the primary offering (percent)				1.50%
Gross proceeds from issuance of common stock	$ 1,072,900,000		$ 1,072,900,000
Estimated reimbursable organization and offering costs, excluding selling commissions and dealer manager fee, as a percentage of total proceeds available to be raised from the primary offering (percent)			1.00%