Condensed Consolidated Statements Of Cash Flows (Parenthetical)	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Condensed Consolidated Statements Of Cash Flows [Abstract]
Issued 141,351 and 392,474 shares of restricted and unrestricted common stock in 2011 and 2010, respectively, pursuant to NNN's performance incentive plan	141,351	392,474
Issued 6,975 and 7,912 shares of common stock in 2011 and 2010, respectively, to directors pursuant to NNN's performance incentive plan	6,975	7,912
Issued 19,962 and 18,605 shares of common stock in 2011 and 2010, respectively, pursuant to NNN's Deferred Director Fee Plan	19,962	18,605
Surrender of 5,215 shares of restricted stock in 2011	5,215