Goodwill and Intangible Assets (Summary of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 25,565	$ 25,515
Accumulated Amortization	(12,477)	(9,834)
Total	13,088	15,681
Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	18,533	18,533
Accumulated Amortization	(7,678)	(5,904)
Total	10,855	12,629
Weighted Average Amortization Period	3 years 9 months 18 days	3 years 9 months 18 days
Customer Contracts [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	5,061	5,061
Accumulated Amortization	(3,148)	(2,485)
Total	1,913	2,576
Weighted Average Amortization Period	3 years 6 months	3 years 6 months
Trade Names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	725	725
Accumulated Amortization	(725)	(644)
Total	0	81
Weighted Average Amortization Period	2 years 8 months 12 days	2 years 8 months 12 days
Non-compete Agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	486	486
Accumulated Amortization	(486)	(421)
Total	0	65
Weighted Average Amortization Period	1 year 2 months 12 days	1 year 2 months 12 days
Patents [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	475	475
Accumulated Amortization	(189)	(145)
Total	286	330
Weighted Average Amortization Period	11 years	11 years
Other [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	285	235
Accumulated Amortization	(251)	(235)
Total	$ 34	$ 0
Weighted Average Amortization Period	3 years	3 years