Acquisition of CapLease and Cole - CapLease Acquisition Narrative (Details) (USD $) In Thousands, unless otherwise specified			0 Months Ended			5 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Feb. 07, 2014 CapLease [Member]	Nov. 05, 2013 CapLease [Member]		Mar. 31, 2014 CapLease [Member]		Mar. 31, 2014 CapLease [Member] Purchase Price Allocation Adjustments [Member]
Business Acquisition [Line Items]
Cash			$ 181,774	$ 920,697	[1]	$ 920,697		$ 0
Properties				(12,027)
Goodwill	2,287,122	102,419		89,875	[1]	102,419		12,544
Accounts payable and accrued expenses				46,484	[1]	47,001		517
Real estate investments acquired				2,036,640	[1]	2,024,613		(12,027)
Below-market leases						$ 57,058	[1]	$ 0

[1] As reported in the Company’s Annual Report on Form 10-K for the year ended December 31, 2013.