Real Estate Investments and Properties Held for Sale - Schedule of Real Estate Held for Sale (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2016 USD ($) property	Dec. 31, 2015 USD ($)
Real Estate [Line Items]
Number of real estate properties held for sale (property) | property	24
Land	$ 327,548	$ 341,911
Buildings, fixtures and improvements	1,633,826	1,685,919
Acquired intangible lease assets	496,907	518,294
Total real estate investments, at cost	2,458,281	2,546,304
Less accumulated depreciation and amortization	(199,130)	(133,329)
Total real estate investments, net	$ 2,259,151	$ 2,412,975
Assets Held for Sale
Real Estate [Line Items]
Number of real estate properties held for sale (property) | property	24
Land	$ 6,521
Buildings, fixtures and improvements	19,071
Acquired intangible lease assets	8,833
Total real estate investments, at cost	34,425
Less accumulated depreciation and amortization	(2,441)
Total real estate investments, net	$ 31,984