Hurricane Laura - Narrative (Details) - Hurricane Laura $ in Millions		3 Months Ended	9 Months Ended		12 Months Ended
	Aug. 27, 2020 week	Sep. 30, 2021 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Unusual or Infrequent Item, or Both [Line Items]
Number of weeks of property closure | week	2
Insurance receivable			$ 28.6		$ 23.0
Received from our insurers proceeds			0.0	$ 0.0
Costs related to our policy claim		$ 0.3	$ 5.6