Goodwill and Identifiable Intangibles (Schedule of Identifiable Intangibles) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Carrying Amount	$ 52,800	$ 52,053
Finite-lived intangible assets, Accumulated Amortization	(4,231)	(3,068)
Finite-lived intangible assets, Net Balance	48,569	48,985
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Carrying Amount	17,482	17,289
Finite-lived intangible assets, Accumulated Amortization	(986)	(516)
Finite-lived intangible assets, Net Balance	$ 16,496	$ 16,773
Technology [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	8 years	8 years
Technology [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	18 years	18 years
Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Carrying Amount	$ 1,600	$ 1,600
Finite-lived intangible assets, Accumulated Amortization	(253)	(213)
Finite-lived intangible assets, Net Balance	$ 1,347	$ 1,387
Trademarks [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	5 years	5 years
Trademarks [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	10 years	10 years
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, Gross Carrying Amount	$ 28,608	$ 28,544
Finite-lived intangible assets, Accumulated Amortization	(2,736)	(2,339)
Finite-lived intangible assets, Net Balance	$ 25,872	$ 26,205
Customer Relationships [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	10 years	10 years
Customer Relationships [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	21 years	21 years
Internally Developed Software [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	5 years	5 years
Finite-lived intangible assets, Gross Carrying Amount	$ 5,110	$ 4,620
Finite-lived intangible assets, Accumulated Amortization	(256)
Finite-lived intangible assets, Net Balance	$ 4,854	$ 4,620