Debt - Deferred Financing Costs, Net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019
Debt Instrument [Line Items]
Financing costs	$ 28,814		$ 28,814		$ 25,315
Less: accumulated amortization	(15,807)		(15,807)		(13,863)
Total deferred financing costs, net	13,007		13,007		11,452
Amortization related to deferred financing costs	1,000	$ 1,000	2,000	$ 2,000
Unsecured term loan facility | Unsecured revolving credit facility
Debt Instrument [Line Items]
Net deferred financing costs	$ 3,200		$ 3,200		$ 4,200