Business Combinations (Intangible Assets Acquired and Their Respective Useful Lives) (Details) (Unicorn [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items]
Identifiable intangible assets	$ 11,429
Developed technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Identifiable intangible assets	8,149
Useful Life (years)	8 years
Customer relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Identifiable intangible assets	1,964
Useful Life (years)	7 years
Non-Compete agreements [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Identifiable intangible assets	$ 1,316
Useful Life (years)	3 years