Related Party Transactions and Arrangements - Acquisition Related Expenses (Details) - Affiliates of Former Manager [Member] - Strategic and Financial Advisory Services Fee [Member] $ in Millions	12 Months Ended
	Dec. 31, 2014 USD ($)
Fortress Portfolio [Member]
Related Party Transaction [Line Items]
Fee paid to related party	$ 1.0
Percentage of contract purchase price	0.25%
Inland Portfolio [Member]
Related Party Transaction [Line Items]
Fee paid to related party	$ 0.6
Percentage of contract purchase price	0.25%