CapLease Acquisition (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Nov. 05, 2013
Liabilities assumed, at fair value:
Goodwill	$ 92,789
CapLease [Member]
Business Acquisition [Line Items]
Fair value of consideration given		920,697
Assets purchased, at fair value:
Land		235,843
Buildings, fixtures and improvements		1,596,481
Land and construction in process		12,352
Acquired intangible lease assets		191,964
Total real estate investments		2,036,640
Cash and cash equivalents		41,799
Investment securities		60,730
Loans held for investment		26,457
Restricted cash		29,119
Prepaid expenses and other assets		21,249
Deferred costs		325
Total identifiable assets purchased		2,216,319
Liabilities assumed, at fair value:
Mortgage notes payable		1,037,510
Secured credit facility		121,000
Other debt		114,208
Below-market leases		57,058
Derivative liabilities		158
Accounts payable and accrued expenses		49,291
Deferred rent and other liabilities		8,619
Total liabilities assumed		1,387,844
Non-controlling interest retained by third party		567
Net identifiable assets acquired by Company		827,908
Goodwill		$ 92,789