Real Estate Investments - Allocation of Purchase Price Paid for Completed Acquisitions (Details) $ in Thousands	12 Months Ended
Dec. 31, 2025 USD ($) property	Dec. 31, 2024 USD ($) property
Real Estate [Line Items]
Number of properties acquired \| property	140	115
Below-market lease intangible liabilities	$ (71)	$ 0
Total	602,961	480,057
Acquisition fees incurred	7,000	4,600
In-place leases
Real Estate [Line Items]
In-place lease intangible assets	42,225	36,580
Above-market leases
Real Estate [Line Items]
In-place lease intangible assets	3,815	0
Land
Real Estate [Line Items]
Purchase price allocation:	245,948	141,074
Buildings
Real Estate [Line Items]
Purchase price allocation:	281,376	266,644
Site improvements
Real Estate [Line Items]
Purchase price allocation:	26,272	31,825
Tenant improvements
Real Estate [Line Items]
Purchase price allocation:	$ 3,396	$ 3,934

Asset Acquisition, Acquisition Related Costs

No definition available.

Name:	ntst_AssetAcquisitionAcquisitionRelatedCosts
Namespace Prefix:	ntst_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Asset Acquisition, Assets Acquired and Liabilities Assumed, Net

+ References

No definition available.

+ Details

Name:	ntst_AssetAcquisitionAssetsAcquiredAndLiabilitiesAssumedNet
Namespace Prefix:	ntst_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Asset Acquisition, Below Market Lease

+ References

No definition available.

+ Details

Name:	ntst_AssetAcquisitionBelowMarketLease
Namespace Prefix:	ntst_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Number of Real Estate Properties Acquired

+ References

No definition available.

+ Details

Name:	ntst_NumberOfRealEstatePropertiesAcquired
Namespace Prefix:	ntst_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 944
-SubTopic 805
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478072/944-805-50-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 350
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482665/350-30-50-1

+ Details

Name:	us-gaap_FinitelivedIntangibleAssetsAcquired1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of acquisition of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

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

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 976
-SubTopic 310
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477332/976-310-50-1

+ Details

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

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_LeasesAcquiredInPlaceMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_AboveMarketLeasesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LandMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingImprovementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_LandImprovementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: