Summary of Significant Accounting Policies (Details) - USD ($)		9 Months Ended
	Aug. 06, 2019	Sep. 30, 2020	Jun. 30, 2020	Dec. 31, 2019	Nov. 26, 2019	Sep. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
Offsetting Assets [Line Items]
Provision for credit losses		$ 300,000
Accounting Standards Update [Extensible List]		us-gaap:AccountingStandardsUpdate201613Member
Stockholders' Equity		$ (288,244,000)	$ (152,237,000)	$ (212,861,000)		$ (218,288,000)	$ (232,972,000)	$ (87,307,000)
Cumulative Effect, Period of Adoption, Adjustment
Offsetting Assets [Line Items]
Stockholders' Equity				108,000
Interest rate swap
Offsetting Assets [Line Items]
Derivative liability, fair value, gross liability		33,100,000
Derivative asset, fair value, gross asset				$ 2,400,000
Secured Debt | Credit Facility
Offsetting Assets [Line Items]
Debt instrument, face amount	$ 350,000,000	$ 540,000,000			$ 190,000,000.0
Interest rate percentage	5.40%	5.40%
Long-term debt, term	7 years	7 years