Noncontrolling Interests (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended		11 Months Ended	12 Months Ended	0 Months Ended	9 Months Ended	12 Months Ended	0 Months Ended	6 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Dec. 31, 2013	Jan. 22, 2013 Tau Operating Partnership, L.P.	Sep. 30, 2014 Tau Operating Partnership, L.P.	Dec. 31, 2013 Tau Operating Partnership, L.P.	Jun. 27, 2013 Realty Income, L.P.	Dec. 31, 2013 Realty Income, L.P.	Sep. 30, 2014 Realty Income, L.P.
Noncontrolling interests
Third party partnership units, ownership interest (as a percent)												2.20%
Realty Income partnership units, ownership interest (as a percent)								99.30%				97.80%
Conversion ratio			1
Change in the carrying value of all noncontrolling interests
Fair value of units issued at beginning of the period						$ 36,563	$ 13,962			$ 22,601
Reallocation of equity			(6,647)									(6,647)
Redemptions			(294)									(294)
Distributions			(1,390)		(1,371)			(521)	(691)		(680)	(869)
Allocation of net income	344	336	1,016	422	719			218	218		501	798
Carrying value at end of the period	28,596		28,596		35,911	35,911		13,186	13,489		22,422	15,410
Units held by third party							317,022	317,022		534,546		524,546
Payment rate per annum (as a percent)							2.00%
Carrying value of preferred units	$ 6,750		$ 6,750		$ 6,750	$ 6,750