Goodwill and Intangible Assets - Schedule of Amounts Recorded for Intangible Assets (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2018	Dec. 31, 2017
Gross Amount		$ 21,669	$ 23,649
Accumulated Amortization		12,821	12,559
Net Amount		$ 8,848	11,090
Patent, Trademarks, Trade Names & URLs [Member]
Weighted Average Estimated Useful Lives (years)		5 years
Gross Amount	[1]	$ 5,701	7,739
Accumulated Amortization		1,771	3,186
Net Amount		$ 3,930	4,553
Customer Relationships [Member]
Weighted Average Estimated Useful Lives (years)		14 years
Gross Amount		$ 13,597	13,533
Accumulated Amortization		9,026	7,799
Net Amount		$ 4,571	5,734
Non-Compete Agreements [Member]
Weighted Average Estimated Useful Lives (years)		4 years
Gross Amount		$ 2,371	2,377
Accumulated Amortization		2,024	1,574
Net Amount		$ 347	$ 803

[1] Includes $2.9 million of trademarks with indefinite useful lives that are not amortized.