v3.25.4

Derivatives - Schedule of Interest Rate Derivatives Designated as Cash Flow Hedges (Details) | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2025 USD ($) Instrument | Jun. 30, 2025 USD ($) | Sep. 30, 2021 USD ($) | Mar. 31, 2020 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2017 USD ($) | Dec. 31, 2016 USD ($)
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated Fair Value | $ 357,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Forward Swap |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Interest Rate Derivatives | Instrument | 2 |  |  |  |  |  |  |  |  |  |  |  |  |
Aggregate Notional Amount | $ 200,000,000 | [1] | $ 200,000,000 |  | $ 120,000,000 |  | $ 200,000,000 |  | $ 250,000,000 |  | $ 250,000,000 |  | $ 180,000,000 |
Estimated Fair Value | $ 357,000 | [2] | $ 409,000 | [3] | $ 1,584,000 | [3] | $ 13,141,000 | [3] | $ (4,080,000) | [3] | $ 7,688,000 | [3] | $ (13,345,000) | [3]
Effective Date | Jan. 15, 2026 |  |  |  |  |  |  |  |  |  |  |  |  |
[1] |
(2) | No hedge ineffectiveness was recognized during the year ended December 31, 2025.
[2] |
(1) | Included in other assets and other comprehensive income on the Consolidated Balance Sheets (see "Note 10 – Fair Value of Financial Instruments").
[3] |
(2) | The amount reported in accumulated other comprehensive income (loss) will be reclassified to interest expense as interest payments are made on the related notes payable.

X
- Definition Net fair value of all derivative instruments designated as cash flow hedging instruments, which is ordinarily reflected within other comprehensive income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480463/815-10-45-5 + Details
Name: | us-gaap_CashFlowHedgesDerivativeInstrumentsAtFairValueNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- 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/2009/role/commonPracticeRef -Topic 815 -SubTopic 20 -Name Accounting Standards Codification -Section 25 -Paragraph 6A -Publisher FASB -URI https://asc.fasb.org/1943274/2147480682/815-20-25-6A Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480237/815-40-50-5 + Details
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 181 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480401/815-10-55-181 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A + Details
Name: | us-gaap_DerivativeNotionalAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of interest rate derivative instruments held by the entity at the reporting date. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-1B Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-1A + Details
Name: | us-gaap_NumberOfInterestRateDerivativesHeld
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Date the plan of reorganization is expected to be effective, in YYYY-MM-DD format. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 852 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481435/852-10-45-17 + Details
Name: | us-gaap_PlanOfReorganizationDatePlansExpectedToBeEffective
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=nnn_ForwardSwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |