Condensed Consolidated Statements Of Cash Flows (Parenthetical)	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
shares of restricted and unrestricted common stock, pursuant to NNN's performance incentive plan (in shares)	396,577	141,351
shares of common stock to directors pursuant to NNN's performance incentive plan (in shares)	12,373	6,975
shares of common stock, pursuant to NNN's Deferred Director Fee Plan (in shares)	14,836	19,962
shares of restricted stock surrendered (in shares)	4,712	5,215