Lease Obligations - Narrative (Details) - USD ($) $ in Millions	1 Months Ended	9 Months Ended
	May 31, 2020	Sep. 30, 2020	Sep. 30, 2019
Lessee, Lease, Description
Option to extend (years)		10 years
Option to terminate (term)		1 year
Rent relief	$ 4.0
Operating lease expense		$ 8.1	$ 8.9
Minimum
Lessee, Lease, Description
Remaining term (years)		1 year
Maximum
Lessee, Lease, Description
Remaining term (years)		10 years
Interest rate (percent)		8.70%