Acquisitions Acquisitions (Intangible Assets Acquired) (Details) (Doremi Labs [Member], USD $) In Thousands, unless otherwise specified	0 Months Ended
	Oct. 31, 2014
Acquired Finite-Lived Intangible Assets [Line Items]
Purchase Price Allocation	$ 45,600
Customer Relationships [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Purchase Price Allocation	25,600
Weighted average useful life	10 years
Developed Technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Purchase Price Allocation	17,500
Weighted average useful life	7 years 6 months
Trade Name [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Purchase Price Allocation	1,300
Weighted average useful life	1 year
Backlog [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Purchase Price Allocation	$ 1,200
Weighted average useful life	1 year