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Segment Information
12 Months Ended
Dec. 31, 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 for any period presented. Therefore, for the years ended December 31, 2012, 2011 and 2010, NNN's operations are reported within one business segment in the consolidated financial statements.