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Segment Information Segment Information (Notes)
9 Months Ended
Sep. 30, 2012
Segment Reporting [Abstract]  
Segment Information
Segment Information:

As a result of a continued reduction of investments in real estate acquired for the purpose of resale, the previously reported segment of inventory assets no longer meets the criteria for significance for separate segment reporting. Therefore, for the quarters and nine months ended September 30, 2012 and 2011, NNN's operations are reported within one business segment in the condensed consolidated financial statements.