Goodwill and Intangible Assets (Summary of Intangible Assets) (Details) - USD ($) $ in Thousands	6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 50,498	$ 50,187
Accumulated Amortization	(21,736)		$ (17,567)
Intangibles, net	28,762		32,620
Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	28,005	27,844
Accumulated Amortization	(13,468)		(11,303)
Intangibles, net	$ 14,537		$ 16,541
Weighted Average Amortization Period	5 years 3 months 18 days		5 years 3 months 18 days
Customer relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 16,008	16,008
Accumulated Amortization	(5,455)		$ (4,055)
Intangibles, net	$ 10,553		$ 11,953
Weighted Average Amortization Period	7 years 10 months 18 days		7 years 10 months 18 days
Trade names [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,287	1,287
Accumulated Amortization	(1,074)		$ (817)
Intangibles, net	$ 213		$ 470
Weighted Average Amortization Period	2 years 9 months 12 days		2 years 9 months 12 days
Non-compete agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,446	1,446
Accumulated Amortization	(800)		$ (625)
Intangibles, net	$ 646		$ 821
Weighted Average Amortization Period	2 years 3 months 12 days		2 years 3 months 12 days
Patents [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 3,440	3,290
Accumulated Amortization	(668)		$ (500)
Intangibles, net	$ 2,772		$ 2,790
Weighted Average Amortization Period	9 years 8 months 18 days		9 years 10 months 18 days
Other [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 312	$ 312
Accumulated Amortization	(271)		$ (267)
Intangibles, net	$ 41		$ 45
Weighted Average Amortization Period	3 years		3 years