Consolidated Statements Of Cash Flows (Parenthetical)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
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	398,578	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	16,078	9,632	10,092
Issued 19,962 and 18,605 shares of common stock in 2011 and 2010, respectively, pursuant to NNN's Deferred Director Fee Plan	19,212	26,023	25,066
Surrender of 5,215 shares of restricted stock in 2011	15,286	5,215	0