Organization And Summary Of Significant Accounting Policies (Computation Of Basic And Diluted Earnings Per Share) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Earnings Per Share, Basic and Diluted, by Common Class, Including Two Class Method [Line Items]
Net earnings attributable to NNN	$ 43,333		$ 34,066
Net earnings available to NNN’s common stockholders	34,474		29,304
Less: Earnings attributable to unvested restricted shares	(163)		(102)
Net earnings used in basic and diluted earnings per share	34,311		29,202
Weighted average number of shares outstanding	122,412,739		114,126,832
Less: Unvested restricted stock	(403,309)		(385,258)
Less: Unvested contingent shares	(433,447)		(250,473)
Weighted average number of shares outstanding used in basic earnings per share	121,575,983		113,491,101
Convertible notes payable (in shares)	0		2,191,512
Other (in shares)	290,968		167,640
Weighted average number of shares outstanding used in diluted earnings per share	121,866,951		115,850,253
Series D Depositary Share
Earnings Per Share, Basic and Diluted, by Common Class, Including Two Class Method [Line Items]
Less: Series D and E preferred stock dividends	(4,762)	[1]	(4,762)	[1]
Series E Depositary Share
Earnings Per Share, Basic and Diluted, by Common Class, Including Two Class Method [Line Items]
Less: Series D and E preferred stock dividends	$ (4,097)	[1]	$ 0	[1]

[1] The Series D and E preferred stock have no maturity date and will remain outstanding unless redeemed.