Acquisition of CapLease and Cole - Cole Acquisition Assets Acquired and Liabilities Assumed (Detail) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013		Feb. 07, 2014
Identifiable Liabilities Assumed at Fair Value:
Goodwill	$ 2,298,677	[1]	$ 92,789	[1]
Real Estate Investment Segment [Member]
Identifiable Liabilities Assumed at Fair Value:
Goodwill	1,739,842		92,789
Cole Merger [Member]
Identifiable Assets Acquired at Fair Value:
Land					1,737,839
Buildings, fixtures and improvements					5,901,827
Intangible lease assets					1,324,217
Total real estate investments					8,963,883
Investment in unconsolidated entities					103,966
Investment securities					151,197
Loans held for investment					72,326
Cash and cash equivalents					149,965
Restricted cash					15,704
Intangible assets					385,368
Deferred costs and other assets					94,667
Due from affiliates					3,301
Total identifiable assets acquired					9,940,377
Identifiable Liabilities Assumed at Fair Value:
Mortgage notes payable					2,706,585
Credit facilities					1,309,000
Other debt					49,013
Below-market lease liabilities					212,433
Accounts payable and accrued expenses					142,243
Deferred rent, derivative and other liabilities					235,299
Dividends payable					6,271
Due to affiliates					44
Total liabilities assumed					4,660,888
Non-controlling interests					24,766
Net identifiable assets acquired					5,254,723
Goodwill					2,212,920
Net assets acquired					7,467,643
Cole Merger [Member] | Real Estate Investment Segment [Member]
Identifiable Assets Acquired at Fair Value:
Land					1,737,839
Buildings, fixtures and improvements					5,901,827
Intangible lease assets					1,324,217
Total real estate investments					8,963,883
Investment in unconsolidated entities					100,659
Investment securities					151,197
Loans held for investment					72,326
Cash and cash equivalents					129,552
Restricted cash					15,704
Intangible assets					0
Deferred costs and other assets					43,774
Due from affiliates					0
Total identifiable assets acquired					9,477,095
Identifiable Liabilities Assumed at Fair Value:
Mortgage notes payable					2,706,585
Credit facilities					1,309,000
Other debt					49,013
Below-market lease liabilities					212,433
Accounts payable and accrued expenses					87,628
Deferred rent, derivative and other liabilities					67,841
Dividends payable					6,271
Due to affiliates					0
Total liabilities assumed					4,438,771
Non-controlling interests					24,766
Net identifiable assets acquired					5,013,558
Goodwill					1,654,085
Net assets acquired					6,667,643
Cole Merger [Member] | Private Capital Management Segment [Member]
Identifiable Assets Acquired at Fair Value:
Land					0
Buildings, fixtures and improvements					0
Intangible lease assets					0
Total real estate investments					0
Investment in unconsolidated entities					3,307
Investment securities					0
Loans held for investment					0
Cash and cash equivalents					20,413
Restricted cash					0
Intangible assets					385,368
Deferred costs and other assets					50,893
Due from affiliates					3,301
Total identifiable assets acquired					463,282
Identifiable Liabilities Assumed at Fair Value:
Mortgage notes payable					0
Credit facilities					0
Other debt					0
Below-market lease liabilities					0
Accounts payable and accrued expenses					54,615
Deferred rent, derivative and other liabilities					167,458
Dividends payable					0
Due to affiliates					44
Total liabilities assumed					222,117
Non-controlling interests					0
Net identifiable assets acquired					241,165
Goodwill	558,800				558,835
Net assets acquired					$ 800,000

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