Intangibles (Narrative) (Details)	6 Months Ended
	Jun. 30, 2018 USD ($)
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 837,000
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	3 years