Consolidated Statements of Cash Flows (Parenthetical) - shares	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Cash Flows [Abstract]
Issued shares of common stock pursuant to conversion premium			2,407,911
Issued shares of restricted and unrestricted common stock, pursuant to NNN's performance incentive plan	258,263	386,433	315,501
Issued shares of common stock, pursuant to NNN's Deferred Director Fee Plan	16,010	16,016	12,308
Surrender of shares of restricted stock			241