Debt - Deferred Financing Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Financing costs	$ 25,315	$ 25,315
Less: accumulated amortization	(13,863)	(10,027)
Total deferred financing costs, net	11,452	15,288
Amortization of financing costs	3,800	4,100	$ 4,700
Revolving Credit Facility | Unsecured revolving credit facility
Debt Instrument [Line Items]
Net deferred financing costs	$ 4,200	$ 6,300