Acquisitions of CapLease, Cole and CCPT - Cole Credit Property Trust Acquisition (Details) (Cole Credit Property Trust, Inc. [Member], USD $)	0 Months Ended	1 Months Ended
	May 19, 2014	Jun. 30, 2014	May 19, 2014
Cole Credit Property Trust, Inc. [Member]
Business Acquisition [Line Items]
Business combination, consideration transferred	$ 73,200,000
Land			28,258,000
Buildings, fixtures and improvements			113,296,000
Acquired intangible lease assets			17,960,000
Total real estate investments			159,514,000
Cash and cash equivalents			167,000
Restricted cash			2,420,000
Prepaid expenses and other assets			297,000
Total identifiable assets acquired			162,398,000
Mortgage notes payable, net			85,286,000
Unsecured credit facility			800,000
Accounts payable and accrued expenses			443,000
Below-market lease liabilities			1,752,000
Due to affiliates			568,000
Deferred rent and other liabilities			390,000
Total liabilities assumed			89,239,000
Net identifiable assets acquired			73,159,000
Revenue of acquiree since acquisition date		1,500,000
Earnings or loss of acquiree since acquisition date		$ (300,000)