CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($)	Total	Series F Preferred Stock	Total  Stockholders’ Equity of NNN	Total  Stockholders’ Equity of NNN Series F Preferred Stock	Preferred Stock Series F Preferred Stock	Common Stock	Capital in Excess of Par Value	Accumulated Deficit	Accumulated Deficit Series F Preferred Stock	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interests
Balances at Dec. 31, 2020	$ 4,319,304,000		$ 4,319,300,000		$ 345,000,000	$ 1,753,000	$ 4,633,771,000	$ (644,779,000)		$ (16,445,000)	$ 4,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	56,587,000		56,587,000					56,587,000
Dividends declared and paid:
Preferred stock dividends declared and paid		$ (4,485,000)		$ (4,485,000)					$ (4,485,000)
Common stock dividends declared and paid	(90,270,000)		(90,270,000)				578,000	(90,848,000)
Issuance of common stock:
Director compensation	267,000		267,000				267,000
Stock purchase plan	70,000		70,000				70,000
ATM equity program	1,234,000		1,234,000			1,000	1,233,000
Restricted shares, net of forfeitures						3,000	(3,000)
Stock issuance costs	(156,000)		(156,000)				(156,000)
Amortization of deferred compensation	3,920,000		3,920,000				3,920,000
Amortization of interest rate hedges	1,368,000		1,368,000							1,368,000
Balances at Mar. 31, 2021	4,287,839,000		4,287,835,000		$ 345,000,000	1,757,000	4,639,680,000	(683,525,000)		(15,077,000)	4,000
Balances at Dec. 31, 2021	3,901,663,000		3,901,662,000			1,757,000	4,662,714,000	(747,853,000)		(14,956,000)	1,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net earnings	81,373,000		81,372,000					81,372,000			1,000
Dividends declared and paid:
Common stock dividends declared and paid	(92,055,000)		(92,055,000)				696,000	(92,751,000)
Issuance of common stock:
Director compensation	305,000		305,000				305,000
Stock purchase plan	52,000		52,000				52,000
Restricted shares, net of forfeitures						2,000	(2,000)
Stock issuance costs	(65,000)		(65,000)				(65,000)
Amortization of deferred compensation	5,890,000		5,890,000				5,890,000
Amortization of interest rate hedges	583,000		583,000							583,000
Balances at Mar. 31, 2022	$ 3,897,746,000		$ 3,897,744,000			$ 1,759,000	$ 4,669,590,000	$ (759,232,000)		$ (14,373,000)	$ 2,000