Leases - Narrative (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Lessee, Lease, Description [Line Items]
Renewal term (in years)		3 years
Right of use asset	$ 12,292		$ 8,246
Lease liability	$ 13,774
McCook
Lessee, Lease, Description [Line Items]
Right of use asset		$ 5,300
Lease liability		$ 5,300