Acquisitions of CapLease, Cole and CCPT - CapLease Acquisition (Details) (USD $) In Thousands, unless otherwise specified			0 Months Ended		8 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Nov. 05, 2013 CapLease [Member]		Jun. 30, 2014 CapLease [Member]
Business Acquisition [Line Items]
Payments to acquire businesses, gross			$ 920,697	[1]	$ 920,697
Identifiable Assets Acquired at Fair Value:
Land			235,843	[1]	233,065
Buildings, fixtures and improvements			1,596,481	[1]	1,591,645
Land and construction in process			12,352	[1]	12,743
Acquired intangible lease assets			191,964	[1]	192,272
Total real estate investments			2,036,640	[1]	2,029,725
Cash and cash equivalents			41,799	[1]	41,799
Investment securities			60,730	[1]	60,730
Loans held for investment			26,457	[1]	26,457
Restricted cash			29,159	[1]	29,119
Prepaid expenses and other assets			21,564	[1]	21,716
Deferred costs			325	[1]	325
Total identifiable assets acquired			2,216,674	[1]	2,209,871
Liabilities assumed, at fair value:
Mortgage notes payable, net			1,037,510	[1]	1,037,510
Secured credit facility			121,000	[1]	121,000
Other debt			114,208	[1]	114,208
Below-market leases			57,058	[1]	57,058
Derivative liabilities			158	[1]	158
Accounts payable and accrued expenses			46,484	[1]	46,590
Deferred rent, derivative and other liabilities			8,867	[1]	8,803
Total liabilities assumed			1,385,285	[1]	1,385,327
Measurement Period Adjustments
Land					(2,778)
Buildings, fixtures and improvements					(4,836)
Land and construction in process					391
Acquired intangible lease assets					308
Total real estate investments					(6,915)
Restricted cash					(40)
Deferred costs and other assets, net					152
Total identifiable assets purchased					(6,803)
Accounts payable and accrued expenses					106
Deferred rent, derivative and other liabilities					(64)
Total liabilities assumed					42
Net identifiable assets acquired by Company					(6,845)
Goodwill					6,845
Noncontrolling interests			567	[1]	567
Net identifiable assets acquired by Company			830,822	[1]	823,977
Goodwill	$ 2,304,880	$ 96,720	$ 89,875	[1]	$ 96,720

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