Acquisitions (Allocation Of Purchase Price To Estimated Fair Values Of Identified Tangible And Intangible Assets Acquired, Net Of Liabilities Assumed) (Details) (Resource Systems [Member], USD $) In Thousands	May 23, 2011
Current assets	$ 5,249
Property and equipment	209
Current liabilities	(6,803)
Deferred tax liabilities	(6,708)
Total net tangible assets acquired	(8,053)
Total intangible assets acquired	18,204
Goodwill	26,130
Total purchase price	36,281
Customer Relationships [Member]
Total intangible assets acquired	11,204
Existing Technologies [Member]
Total intangible assets acquired	6,401
Non-compete Agreements [Member]
Total intangible assets acquired	$ 599