Acquisitions of CapLease, Cole and CCPT - Cole Acquisition Assets Acquired and Liabilities Assumed (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Identifiable Liabilities Assumed at Fair Value:
Goodwill	$ 2,096,450	$ 92,789	[1]
Cole Merger [Member]
Identifiable Assets Acquired at Fair Value:
Land	1,737,839
Buildings, fixtures and improvements	5,901,827
Acquired intangible lease assets	1,324,217
Total real estate investments	8,963,883
Investment in unconsolidated entities	103,966
Investment securities, at fair value	151,197
Loans held for investment, net	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, net	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 Capital Segment [Member]
Identifiable Liabilities Assumed at Fair Value:
Goodwill	558,835	0
Cole Capital Segment [Member] | Cole Merger [Member]
Identifiable Assets Acquired at Fair Value:
Investment in unconsolidated entities	3,307
Cash and cash equivalents	20,413
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:
Accounts payable and accrued expenses	54,615
Deferred rent, derivative and other liabilities	167,458
Due to affiliates	44
Total liabilities assumed	222,117
Net identifiable assets acquired	241,165
Goodwill	558,835
Net assets acquired	800,000
Real Estate Investment Segment [Member]
Identifiable Liabilities Assumed at Fair Value:
Goodwill	1,537,615	92,789
Real Estate Investment Segment [Member] | Cole Merger [Member]
Identifiable Assets Acquired at Fair Value:
Land	1,737,839
Buildings, fixtures and improvements	5,901,827
Acquired intangible lease assets	1,324,217
Total real estate investments	8,963,883
Investment in unconsolidated entities	100,659
Investment securities, at fair value	151,197
Loans held for investment, net	72,326
Cash and cash equivalents	129,552
Restricted cash	15,704
Deferred costs and other assets	43,774
Total identifiable assets acquired	9,477,095
Identifiable Liabilities Assumed at Fair Value:
Mortgage notes payable, net	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
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

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