Goodwill and Other Intangible Assets (Intangible Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Intangible assets subject to amortization (Definite-lived)	$ 43,502	$ 45,026
Accumulated amortization	(27,924)	(27,034)
Net intangible assets subject to amortization	15,578	17,992
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract]
Intangible assets, net	17,656	20,475
Trade names
Indefinite-lived Intangible Assets (Excluding Goodwill) [Abstract]
Intangible assets not subject to amortization (Indefinite-lived)	2,078	2,483
Patents and acquired technology
Finite-Lived Intangible Assets [Line Items]
Intangible assets subject to amortization (Definite-lived)	9,067	9,439
Accumulated amortization	(4,103)	(3,839)
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Intangible assets subject to amortization (Definite-lived)	20,941	21,810
Accumulated amortization	(10,399)	(9,657)
Trade names
Finite-Lived Intangible Assets [Line Items]
Intangible assets subject to amortization (Definite-lived)	1,674	1,693
Accumulated amortization	(1,674)	(1,688)
Non-competition agreements
Finite-Lived Intangible Assets [Line Items]
Intangible assets subject to amortization (Definite-lived)	11,820	12,084
Accumulated amortization	$ (11,748)	$ (11,850)

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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