Fair Value of Financial Instruments - Fair Value, by Balance Sheet Grouping (Details) - Significant Unobservable Inputs Level 3 - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Revolving Credit Facility | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	$ 266.3
Revolving Credit Facility | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	264.0	$ 199.1
Mortgage notes payable | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt, fair value	$ 1,500.0	$ 1,300.0