Acquisitions of CapLease, Cole and CCPT - Cole Credit Property Trust Acquisition (Detail) (Cole Credit Property Trust, Inc. [Member], USD $) In Thousands, unless otherwise specified	May 19, 2014
Cole Credit Property Trust, Inc. [Member]
Business Acquisition [Line Items]
Land	$ 28,258
Buildings, fixtures and improvements	113,296
Acquired intangible lease assets	17,960
Total real estate investments	159,514
Cash and cash equivalents	167
Restricted cash	2,420
Prepaid expenses and other assets	297
Total identifiable assets acquired	162,398
Mortgage notes payable	85,286
Unsecured credit facility	800
Accounts payable and accrued expenses	443
Below-market lease liability	1,752
Due to affiliates	568
Deferred rent and other liabilities	390
Total liabilities assumed	89,239
Net identifiable assets acquired	$ 73,159