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Represents the conversion ratio for noncontrolling interest redeemable in common stock.

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No definition available.

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Represents the reallocation of equity between limited and general partner.

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No definition available.

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Represents entity's interest in net assets of the partnership, expressed as a percentage.

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No definition available.

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Represents the ownership interest represented by the partnership units issued on business combination.

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No definition available.

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Number of units held by third party.

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No definition available.

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Amount of preferred units issued upon business acquisition.

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The cash outflow or inflow increase (decrease) in distribution due to real estate partnership based upon payments and accruals.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest).

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Amount of Net Income (Loss) attributable to noncontrolling interest.

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Amount of increase in noncontrolling interest from sale of a portion of the parent's controlling interest.

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No definition available.

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- Definition

Value of stock issued during the period upon the conversion of units. An example of a convertible unit is an umbrella partnership real estate investment trust unit (UPREIT unit).

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Regulation S-X (SX)

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Noncontrolling Interests (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Jan. 22, 2013	Jun. 27, 2013
Noncontrolling interests
Conversion ratio	1
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period	$ 35,911us-gaap_MinorityInterest
Fair value of units issued at beginning of the period		36,563
Allocation of net income	1,305	719
Carrying value at end of the period	27,698us-gaap_MinorityInterest	35,911us-gaap_MinorityInterest
Carrying value of preferred units	6,750	6,750
Noncontrolling interests
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period	35,911
Fair value of units issued at beginning of the period		36,563
Reallocation of equity	(6,647)
Redemption	(1,032)
Distributions	(1,839)	(1,371)
Allocation of net income	1,305	719
Carrying value at end of the period	27,698	35,911
Tau Operating Partnership, L.P.
Noncontrolling interests
Realty Income partnership units, ownership interest (as a percent)	99.30%
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period	13,489
Fair value of units issued at beginning of the period		13,962
Distributions	(695)	(691)
Allocation of net income	273	218
Carrying value at end of the period	13,067	13,489
Units held by third party	317,022		317,022
Carrying value of preferred units	6,750
Realty Income, L.P.
Noncontrolling interests
Third party partnership units, ownership interest (as a percent)	2.10%
Realty Income partnership units, ownership interest (as a percent)	97.90%
Change in the carrying value of all noncontrolling interests
Carrying value at beginning of the period	22,422
Fair value of units issued at beginning of the period		22,601
Reallocation of equity	(6,647)
Redemption	(1,032)
Distributions	(1,144)	(680)
Allocation of net income	1,032	501
Carrying value at end of the period	$ 14,631	$ 22,422
Units held by third party	499,546			534,546