Mortgage Notes and Revolving Credit Facility - Summary of Mortgage Notes and Revolving Credit Facility Secured by Company's Properties (Details) - USD ($) $ in Thousands		6 Months Ended	9 Months Ended
		Jun. 30, 2020	Sep. 30, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		2.40%
Principal Balance Outstanding	[1]		$ 2,495,237	$ 1,245,022
Deferred financing costs, net	[1]		(13,033)	(7,136)
Premium on assumed debt, net	[1]		268	216
Mortgage notes and revolving credit facility, net	[1]		2,482,472	1,238,102
Fixed Rate Loans
Debt Instrument [Line Items]
Principal Balance Outstanding	[1]		1,543,340	1,004,423
Variable Rate Loans
Debt Instrument [Line Items]
Principal Balance Outstanding	[1]		$ 951,897	240,599
One-Month LIBOR
Debt Instrument [Line Items]
Weighted Average Interest Rate			0.15%
Variable Rate Revolving Credit Facilities | Variable Rate Loans
Debt Instrument [Line Items]
Maximum Facility Size	[2]		$ 200,000
Principal Balance Outstanding	[1],[2]		$ 172,800
Variable Rate Revolving Credit Facilities | Variable Rate Loans | Weighted Average
Debt Instrument [Line Items]
Weighted Average Maturity Date	[2],[3]		Oct. 21, 2021
Variable Rate Revolving Credit Facilities | One-Month LIBOR | Variable Rate Loans | Weighted Average
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	[2],[4]		2.00%
Fixed Rate Mortgages | Fixed Rate Loans
Debt Instrument [Line Items]
Weighted Average Interest Rate	[4]		2.69%
Principal Balance Outstanding	[1]		$ 1,543,340	1,004,423
Fixed Rate Mortgages | Fixed Rate Loans | Weighted Average
Debt Instrument [Line Items]
Weighted Average Maturity Date	[3]		Sep. 26, 2029
Floating Rate Mortgages | Variable Rate Loans
Debt Instrument [Line Items]
Principal Balance Outstanding	[1]		$ 779,097	$ 240,599
Floating Rate Mortgages | Variable Rate Loans | Weighted Average
Debt Instrument [Line Items]
Weighted Average Maturity Date	[3]		Mar. 01, 2025
Floating Rate Mortgages | One-Month LIBOR | Variable Rate Loans | Weighted Average
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate	[4]		1.75%

[1] The majority of the Company’s mortgages contain yield or spread maintenance provisions.

[2] The Company’s revolving credit facility is used as bridge financing and can be drawn upon to fund the acquisition of future real estate investments.

[3] For loans where the Company, at its own discretion, has extension options, the maximum maturity date has been assumed.

[4] The term “L” refers to the one-month LIBOR. As of September 30, 2020, one-month LIBOR was equal to 0.15%.