Consolidated Statements Of Cash Flows (Parenthetical)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
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	0	392,474	262,546
Issued 6,975 and 7,912 shares of common stock in 2011 and 2010, respectively, to directors pursuant to NNN's performance incentive plan	0	10,092	6,594
Issued 19,962 and 18,605 shares of common stock in 2011 and 2010, respectively, pursuant to NNN's Deferred Director Fee Plan	0	25,066	41,604
Surrender of 5,215 shares of restricted stock in 2011	2,520