Lease Obligations - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Sep. 30, 2019
Lessee, Lease, Description [Line Items]
Option to extend	10 years
Option to terminate	1 year
Operating leases, rent expense	$ 11.6
Operating leases, rent expense		$ 12.3	$ 12.3
Weighted average remaining lease term	4 years 8 months 16 days	5 years 3 months 4 days
Weighted average discount rate	6.47%	6.25%
Minimum
Lessee, Lease, Description [Line Items]
Remaining term	1 year
Interest rate				4.30%
Maximum
Lessee, Lease, Description [Line Items]
Remaining term	6 years
Interest rate				8.70%