Represents the annual distribution rate on common stock.

No definition available.

Name:	nsre_AnnualDistributionRate
Namespace Prefix:	nsre_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of shares remaining available for sale under the dividend reinvestment plan.

+ References

No definition available.

+ Details

Name:	nsre_CommonStockSharesRemainingAvailableForSalePursuantToDistributionReinvestmentPlan
Namespace Prefix:	nsre_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the number of shares remaining available for sale under Primary Offering.

+ References

No definition available.

+ Details

Name:	nsre_CommonStockSharesRemainingAvailableForSalePursuantToPrimaryOffering
Namespace Prefix:	nsre_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the increase of additional borrowings on existing and new debt instruments together with the sponsor.

+ References

No definition available.

+ Details

Name:	nsre_DebtInstrumentIncreaseAdditionalBorrowingsWithSponsor
Namespace Prefix:	nsre_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represent the daily amount of distribution per share considered as a basis to pay monthly distributions to stockholders.

+ References

No definition available.

+ Details

Name:	nsre_DividendsDailyAmountAccruedPerShare
Namespace Prefix:	nsre_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the expected initial current yield on equity method investments.

+ References

No definition available.

+ Details

Name:	nsre_EquityMethodInvestmentsExpectedInitialCurrentYield
Namespace Prefix:	nsre_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the amount of unrestricted cash or cash equivalents required to be maintained at all times under the terms of financial covenant of the debt instrument.

+ References

No definition available.

+ Details

Name:	nsre_LineOfCreditFacilityFinancialCovenantUnrestrictedCashOrCashEquivalentsAmount
Namespace Prefix:	nsre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the number of rooms.

+ References

No definition available.

+ Details

Name:	nsre_NumberOfRooms
Namespace Prefix:	nsre_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	nsre_OfferingProceedsAbstract
Namespace Prefix:	nsre_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	nsre_ShareRepurchaseProgramAbstract
Namespace Prefix:	nsre_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the sale of shares pursuant to primary offering and distribution reinvestment plan, collectively referred to as the Offering.

+ References

No definition available.

+ Details

Name:	nsre_StockIssuedDuringPeriodSharesNewIssuesAndDividendReinvestmentPlan
Namespace Prefix:	nsre_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the gross proceeds from sale of shares pursuant to the primary offering and distribution reinvestment plan, collectively referred to as the Offering.

+ References

No definition available.

+ Details

Name:	nsre_StockIssuedDuringPeriodValueNewIssuesAndDividendReinvestmentPlan
Namespace Prefix:	nsre_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the repurchase price per share for stock redeemed or called during the period.

+ References

No definition available.

+ Details

Name:	nsre_StockRedeemedOrCalledPricePaidPerShare
Namespace Prefix:	nsre_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Increase of additional borrowings on existing and new debt instruments.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(f))

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph f

-Article 4

+ Details

Name:	us-gaap_DebtInstrumentIncreaseAdditionalBorrowings
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	us-gaap_DividendsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 159

-Paragraph 18

-Subparagraph f

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 18

-Paragraph 20

-Subparagraph a (1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Name:	us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.12)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=16385135&loc=d3e33749-111570

+ Details

Name:	us-gaap_EquityMethodInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_InvestmentsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_LineOfCreditFacilityAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 2, 4

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Number of stock bought back by the entity at the exercise price or redemption price.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section 50

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 4, 5

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

+ Details

Name:	us-gaap_StockRedeemedOrCalledDuringPeriodShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Equity impact of the value of stock bought back by the entity at the exercise price or redemption price.

+ References

+ Details

Name:	us-gaap_StockRedeemedOrCalledDuringPeriodValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Subsequent Events (Details) (USD $)	3 Months Ended	12 Months Ended			3 Months Ended		0 Months Ended	1 Months Ended	4 Months Ended		0 Months Ended		1 Months Ended
Subsequent Events (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 Loan Facility 2	Jul. 31, 2012 Loan Facility 2	Mar. 31, 2013 Loan Facility 2 Minimum	Mar. 31, 2013 Loan Facility 2 Maximum	May 08, 2013 Subsequent event	May 13, 2013 Subsequent event	Apr. 30, 2013 Subsequent event	Apr. 18, 2013 Subsequent event Loan Facility 2	Apr. 18, 2013 Subsequent event Loan Facility 2 Minimum	Apr. 18, 2013 Subsequent event Loan Facility 2 Maximum	Apr. 30, 2013 Subsequent event Milford Plaza hotel room	Apr. 30, 2013 Subsequent event Milford Plaza hotel Sponsor	Apr. 30, 2013 Subsequent event Milford Plaza hotel Credit facilities with Deutsche Bank AG
Offering Proceeds
Common shares sold pursuant to Offering								15,000,000
Gross proceeds pursuant to Offering								$ 149,300,000
Shares remaining available for sale under Primary Offering								11,900,000
Shares remaining available for sale under DRP								8,300,000
Distributions
Daily cash distribution accrued per share (in dollars per share)	$ 0.002185792						$ 0.002191781
Annual distribution rate (as a percent)	8.00%						8.00%
Share Repurchases
Number of shares repurchased	100,000	100,000							200,000
Total amount of shares repurchased	1,019,000	1,371,000							1,700,000
Repurchase price paid per share (in dollars per share)	$ 9.74	$ 9.62							$ 9.36
New Investments
Investments financed by borrowings together with Sponsor													255,000,000
Number of rooms													1,331
Ownership percentage													35.00%
Investments financed by borrowings													89,300,000	165,700,000	130,000,000
Expected initial current yield (as a percent)													12.50%
Carrying value of invested equity													43,800,000
Credit Facilities
Maximum borrowing capacity			100,000,000	50,000,000						150,000,000
Unrestricted cash or cash equivalents required to be maintained under financial covenants					$ 3,800,000	$ 15,000,000					$ 3,800,000	$ 22,500,000