XML 29 R24.htm IDEA: XBRL DOCUMENT
v3.3.0.814

Organization and Summary of Significant Accounting Policies (Gross Intangible Assets and Liabilities) (Details) - USD ($) $ in Thousands | Sep. 30, 2015 | Dec. 31, 2014
--- | --- | ---
Value of above market in-place leases, net |  |
Intangible lease assets (included in Other assets): |  |
Intangible lease assets (included in Other assets): | $ 11,268 | $ 11,751
Value of in-place leases, net |  |
Intangible lease assets (included in Other assets): |  |
Intangible lease assets (included in Other assets): | 64,067 | 65,770
Value of below market in-place leases, net |  |
Intangible lease liabilities (included in Other liabilities): |  |
Intangible lease liabilities (included in Other liabilities): | $ 26,813 | $ 29,162

X
- Definition Intangible Liabilities Net Including Goodwill Abstract [Abstract] + References No definition available. + Details
Name: | nnn_IntangibleLiabilitiesNetIncludingGoodwillAbstractAbstract
Namespace Prefix: | nnn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_IntangibleAssetsNetIncludingGoodwillAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition This element represents a liability associated with the acquisition of an off-market lease when the terms of the lease are unfavorable to the market terms for the lease at the date of acquisition. + 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 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_OffMarketLeaseUnfavorable
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=nnn_LeasesAcquiredAboveInPlaceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_LeasesAcquiredInPlaceMarketAdjustmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |