Related Party Transactions - Schedule of Transactions (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Due to Related Parties [Roll Forward]
Incurred	$ 5,966	$ 7,477
Due to affiliates	15,879		$ 16,896
Operating expenses
Due to Related Parties [Roll Forward]
Incurred	678	591
Due to affiliates	678		658
Asset management fees
Due to Related Parties [Roll Forward]
Incurred	0	2,746
Due to affiliates	0		0
Property management fees
Due to Related Parties [Roll Forward]
Incurred	459	426
Due to affiliates	153		158
Performance distribution allocation
Due to Related Parties [Roll Forward]
Incurred	2,061	0
Due to affiliates	2,085		2,394
Advisory fees
Due to Related Parties [Roll Forward]
Incurred	2,301	0
Due to affiliates	769		762
Capitalized/Offering - Acquisition Fees and Expenses [Member]
Due to Related Parties [Roll Forward]
Incurred	0	402
Due to affiliates	0		0
Capitalized/Offering - Organization and offering expense
Due to Related Parties [Roll Forward]
Incurred	240	0
Due to affiliates	432		192
Capitalized/Offering - Other costs advanced by the Advisor
Due to Related Parties [Roll Forward]
Incurred	71	203
Due to affiliates	358		285
Capitalized/Offering - Selling commissions
Due to Related Parties [Roll Forward]
Incurred	11	1,125
Due to affiliates	0		0
Capitalized/Offering - Dealer Manager fees
Due to Related Parties [Roll Forward]
Incurred	45	392
Due to affiliates	0		0
Capitalized/Offering - servicing fee
Due to Related Parties [Roll Forward]
Incurred	82	355
Due to affiliates	11,378		12,377
Advisor Advances - Organization and Offering Expenses [Member]
Due to Related Parties [Roll Forward]
Incurred	18	448
Due to affiliates	26		8
Advisor advances - Dealer Manager fees
Due to Related Parties [Roll Forward]
Incurred	0	$ 789
Due to affiliates	$ 0		$ 62