Intangibles (Narrative) (Details)	3 Months Ended
	Mar. 31, 2018 USD ($)
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 418,000
Minimum
Finite-Lived Intangible Assets [Line Items]
Finite-Lived intangible assets, useful life	1 year
Maximum
Finite-Lived Intangible Assets [Line Items]
Finite-Lived intangible assets, useful life	10 years
Weighted Average
Finite-Lived Intangible Assets [Line Items]
Finite-Lived intangible assets, useful life	4 years