Acquisitions (Narrative) (Details) (USD $)	3 Months Ended			1 Months Ended		0 Months Ended	1 Months Ended	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013	Jan. 31, 2014 Framehawk, Inc. [Member]	Jan. 31, 2014 Framehawk, Inc. [Member] Product Related Technologies [Member]	Apr. 28, 2014 Other 2014 Acquisition [Member] Subsequent Event [Member]	Jan. 31, 2013 Zenprise, Inc. [Member]	Mar. 31, 2014 Zenprise, Inc. [Member]	Dec. 31, 2013 Other 2013 Acquisitions [Member]	Sep. 30, 2013 Other 2013 Acquisitions [Member]	Sep. 30, 2013 Other 2013 Acquisitions [Member] Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Total consideration in business acquisition, net of cash acquired	$ 24,154,000		$ 324,049,000	$ 24,200,000		$ 17,200,000
Cash acquired in business combination				300,000		800,000	2,900,000
Goodwill acquired	14,569,000	[1]		14,600,000
Assets acquired				28,900,000
Identifiable intangible assets acquired					14,000,000
Useful life of intangible assets acquired				7 years 0 months
Contingent consideration amount											3,000,000
Transaction costs				100,000		200,000	600,000		200,000	200,000
Transaction costs expensed during period								100,000
Stock options converted and assumed							285,817
Total consideration in business acquisition							$ 324,000,000		$ 5,500,000	$ 5,300,000

[1] Amount relates to Framehawk acquisition. See Note 4 for more information regarding the Company’s acquisitions.