Acquisitions of CapLease, Cole and CCPT - CapLease Acquisition (Detail) (USD $)	0 Months Ended
	Nov. 05, 2013		Jun. 30, 2014		Dec. 31, 2013
Liabilities assumed, at fair value:
Goodwill			$ 2,293,020,000	[1]	$ 92,789,000	[1]
CapLease [Member]
Business Acquisition [Line Items]
Fair value of consideration given	920,697,000	[2]
Assets purchased, at fair value:
Land	235,843,000	[2]
Buildings, fixtures and improvements	1,596,481,000	[2]
Land and construction in process	12,352,000	[2]
Acquired intangible lease assets	191,964,000	[2]
Total real estate investments	2,036,640,000	[2]
Cash and cash equivalents	41,799,000	[2]
Investment securities	60,730,000	[2]
Loans held for investment	26,457,000	[2]
Restricted cash	29,119,000	[2]
Deferred costs and other assets, net	21,574,000	[2]
Total identifiable assets acquired	2,216,319,000	[2]
Liabilities assumed, at fair value:
Mortgage notes payable	1,037,510,000	[2]
Secured credit facility	121,000,000	[2]
Other debt	114,208,000	[2]
Below-market leases	57,058,000	[2]
Derivative liabilities	158,000	[2]
Accounts payable and accrued expenses	49,291,000	[2]
Deferred rent, derivative and other liabilities	8,619,000	[2]
Total liabilities assumed	1,387,844,000	[2]
Non-controlling interest retained by third party	567,000	[2]
Net identifiable assets acquired by Company	827,908,000	[2]
Goodwill	$ 92,789,000	[2]

[1] For discussion on the restatement adjustments, see Note 2 - Restatement of Previously Issued Financial Statements.

[2] As reported in the Amended 10-K.