Related Party Transactions (Summary of Offering Fees) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Related Party Transaction
Due from (to) related party	$ (42,782)	$ (26,022)
Dealer Manager | Selling Commissions
Related Party Transaction
Due from (to) related party	0	(4)
Dealer Manager | Dealer Manager Fee
Related Party Transaction
Due from (to) related party	0	(3)
Dealer Manager | Distribution and Servicing Fees
Related Party Transaction
Due from (to) related party	$ (22,479)	$ (8,332)
Initial Offering | Maximum
Related Party Transaction
Distribution and stockholder servicing fee payment threshold, percent of total gross offering proceeds	10.00%
Follow-on Offering | Maximum
Related Party Transaction
Distribution and stockholder servicing fee payment threshold, percent of total gross offering proceeds	10.00%
Class AX | Initial Offering
Related Party Transaction
Dealer manager fee percentage paid by advisor	1.50%
Class AX | Initial Offering | Dealer Manager
Related Party Transaction
Distribution and stockholder servicing fees, percent	0.00%
Class AX | Initial Offering | Dealer Manager | Selling Commissions
Related Party Transaction
Related party fee (percent)	7.00%
Class AX | Initial Offering | Dealer Manager | Dealer Manager Fee
Related Party Transaction
Related party fee (percent)	1.50%
Class TX | Initial Offering
Related Party Transaction
Dealer manager fee percentage paid by advisor	1.50%
Class TX | Initial Offering | Dealer Manager
Related Party Transaction
Distribution and stockholder servicing fees, percent	1.00%
Class TX | Initial Offering | Dealer Manager | Selling Commissions
Related Party Transaction
Related party fee (percent)	2.00%
Class TX | Initial Offering | Dealer Manager | Dealer Manager Fee
Related Party Transaction
Related party fee (percent)	1.25%
Class IX | Initial Offering
Related Party Transaction
Dealer manager fee percentage paid by advisor	1.50%
Class IX | Initial Offering | Dealer Manager
Related Party Transaction
Distribution and stockholder servicing fees, percent	0.25%
Class IX | Initial Offering | Dealer Manager | Selling Commissions
Related Party Transaction
Related party fee (percent)	0.00%
Class IX | Initial Offering | Dealer Manager | Dealer Manager Fee
Related Party Transaction
Related party fee (percent)	0.00%
Class TX and IX | Initial Offering | Maximum
Related Party Transaction
Distribution and stockholder servicing fee payment threshold, percent of gross offering price on individual account	10.00%
Class T | Follow-on Offering | Dealer Manager
Related Party Transaction
Distribution and stockholder servicing fee, percent	1.00%
Class T | Follow-on Offering | Dealer Manager | Selling Commissions And Dealer Manager Fee
Related Party Transaction
Related party fee (percent)	3.50%
Class S | Follow-on Offering | Dealer Manager
Related Party Transaction
Distribution and stockholder servicing fee, percent	1.00%
Class S | Follow-on Offering | Dealer Manager | Selling Commissions
Related Party Transaction
Related party fee (percent)	3.50%
Class S | Follow-on Offering | Dealer Manager | Selling Commissions And Dealer Manager Fee
Related Party Transaction
Related party fee (percent)	3.50%
Class D | Follow-on Offering | Dealer Manager
Related Party Transaction
Distribution and stockholder servicing fee, percent	0.25%
Class D | Follow-on Offering | Dealer Manager | Selling Commissions And Dealer Manager Fee
Related Party Transaction
Related party fee (percent)	0.00%
Class I | Follow-on Offering | Dealer Manager
Related Party Transaction
Distribution and stockholder servicing fee, percent	0.00%
Class I | Follow-on Offering | Dealer Manager | Selling Commissions And Dealer Manager Fee
Related Party Transaction
Related party fee (percent)	0.00%