Business Combinations (Allocation Of The Total Purchase Price Consideration) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012
Exervio [Member]
Acquired tangible assets	$ 2.7
Acquired intangible assets	4.5
Liabilities assumed	(1.2)
Goodwill	5.2
Total purchase price	11.2
JCB [Member]
Acquired tangible assets	3.1
Acquired intangible assets	3.0
Liabilities assumed	(1.2)
Goodwill	11.7
Total purchase price	16.6
PointBridge [Member]
Acquired tangible assets	5.6
Acquired intangible assets	6.2
Liabilities assumed	(1.1)
Goodwill	9.8
Total purchase price	20.5
Nascent [Member]
Acquired tangible assets	3.9
Acquired intangible assets	4.4
Liabilities assumed	(1.0)
Goodwill	9.2
Total purchase price	16.5
Northridge [Member]
Acquired tangible assets	3.5
Acquired intangible assets	4.1
Liabilities assumed	(3.1)
Goodwill	9.4
Total purchase price	$ 13.9