Mergers with Real Estate Businesses - Fair Value of Assets Acquired and Liabilities Assumed at CCPT Acquisition (Details) - Cole Credit Property Trust, Inc. [Member] $ in Thousands	May 19, 2014 USD ($)
Identifiable assets acquired at fair value:
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 purchased	162,398
Identifiable liabilities assumed at fair value:
Mortgage notes payable	85,286
Unsecured credit facility	800
Accounts payable and accrued expenses	443
Below-market lease liabilities	1,752
Due to affiliates	568
Deferred rent, derivative and other liabilities	390
Total liabilities assumed	89,239
Net identifiable assets acquired	$ 73,159