Restructuring Activities - Narratives (Details) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)	Jul. 17, 2020 a
Restructuring Cost and Reserve
Restructuring costs	$ 0.3	$ 5.6	$ 1.0	$ 10.8
Facility In Beasley, Texas
Restructuring Cost and Reserve
Area of land (acres) | a						260
Lease facility in Tulsa, Oklahoma | Facility Closing
Restructuring Cost and Reserve
Restructuring costs					$ 2.7
Lease facility in Tulsa, Oklahoma | Facility Closing | Scenario, Plan
Restructuring Cost and Reserve
Restructuring costs			9.0
Tulsa, Oklahoma Facility To Our Beasley, Texas Facility | Facility Start-Up
Restructuring Cost and Reserve
Restructuring costs	$ 4.8		$ 5.2