Related Party Transactions and Arrangements - Investment from the ARCT IV Special Limited Partner (Details) - ARCT IV OP [Member] $ in Millions	12 Months Ended
	Dec. 31, 2016 USD ($) shares
Related Party Transaction [Line Items]
Issuance of Common OP units, net | $	$ 0.8
Issuance of Common OP units, net (shares) | shares	79,870