Stockholders' Equity - Stock Distribution (Narrative) (Details) - USD ($)			1 Months Ended	12 Months Ended
	Nov. 10, 2016	Oct. 26, 2016	Apr. 30, 2016	Dec. 31, 2016
Class of Stock [Line Items]
Offering extension period	1 year
Offering threshold for special stock dividends	$ 25,000,000		$ 100,000,000
Selling commissions or dealer manager fees paid				$ 0
Period following record date for special stock dividend	90 days
Class A
Class of Stock [Line Items]
Common stock dividends, (in shares)				38,293
Percent of current gross offering price for special stock dividend	10.00%			5.00%
Stock issued during period, value, stock dividend				$ 383
Selling commissions (per share)		7.00%
Dealer manager fee (per share)		3.00%
Class T
Class of Stock [Line Items]
Common stock dividends, (in shares)				14,816
Percent of current gross offering price for special stock dividend				5.00%
Stock issued during period, value, stock dividend				$ 148
Selling commissions (per share)		2.00%
Dealer manager fee (per share)		2.75%
Class I
Class of Stock [Line Items]
Common stock dividends, (in shares)				3,676
Percent of current gross offering price for special stock dividend				5.00%
Stock issued during period, value, stock dividend				$ 37
Dealer Manager | Class A
Class of Stock [Line Items]
Selling commissions (per share)				7.00%
Dealer manager fee (per share)				3.00%
Dealer Manager | Class T
Class of Stock [Line Items]
Selling commissions (per share)				2.00%
Dealer manager fee (per share)				2.75%
Dealer Manager | Class I
Class of Stock [Line Items]
Selling commissions (per share)				0.00%
Dealer manager fee (per share)				0.00%