Intangible Assets - Amortization (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 12,580	$ 12,551
Accumulated Amortization	(7,939)	(6,895)
Net Carrying Amount	4,641	5,656
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	9,476	9,447
Accumulated Amortization	(5,191)	(4,457)
Net Carrying Amount	4,285	4,990
Intellectual property and other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,104	3,104
Accumulated Amortization	(2,748)	(2,438)
Net Carrying Amount	$ 356	$ 666