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Segment Information Segment Information (Notes)
3 Months Ended
Mar. 31, 2012
Segment Reporting [Abstract]  
Segment Reporting Disclosure [Text Block]
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 ended March 31, 2012 and 2011, NNN's operations are reported within one business segment in the financial statements.