Goodwill and Other Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
GOODWILL AND OTHER INTANGIBLE ASSETS
Definite-lived, Gross Carrying Amount	$ 31,695	$ 26,145
Definite-lived, Accumulated Amortization	(15,212)	(11,831)
Definite-lived, Net Carrying Amount	16,483	14,314
Total other intangible assets, Gross Carrying Amount	40,765	35,215
Total other intangible assets, Accumulated Amortization	(15,212)	(11,831)
Accumulated Impairment	(4,953)	(4,953)
Total other intangible assets, Net Carrying Amount	20,600	18,431
Trade name
GOODWILL AND OTHER INTANGIBLE ASSETS
Indefinite lived, Gross Carrying Amount	9,070	9,070
Indefinite lived, Accumulated Impairment	(4,953)	(4,953)
Indefinite lived, Net Carrying Amount	4,117	4,117
Customer lists
GOODWILL AND OTHER INTANGIBLE ASSETS
Definite-lived, Gross Carrying Amount	22,384	16,879
Definite-lived, Accumulated Amortization	(8,705)	(5,845)
Definite-lived, Net Carrying Amount	13,679	11,034
Trade name
GOODWILL AND OTHER INTANGIBLE ASSETS
Definite-lived, Gross Carrying Amount	255	255
Definite-lived, Accumulated Amortization	(195)	(176)
Definite-lived, Net Carrying Amount	60	79
Patents and other intangibles
GOODWILL AND OTHER INTANGIBLE ASSETS
Definite-lived, Gross Carrying Amount	9,056	9,011
Definite-lived, Accumulated Amortization	(6,312)	(5,810)
Definite-lived, Net Carrying Amount	$ 2,744	$ 3,201