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Intangible assets gross excluding goodwill.

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The calculated weighted-average useful life of all finite-lived intangible assets revised as a result of evaluating the remaining useful lives of certain intangible assets.

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The calculated weighted-average amortization period of a major class of finite-lived intangible assets acquired during the current period either individually or as part of a group of assets (in either an asset acquisition or business combination). A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

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The accumulated amount of amortization of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

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Sum of the gross carrying amounts before accumulated amortization as of the balance sheet date of all intangible assets having statutory or estimated useful lives. The aggregate gross carrying amount (including any previously recognized impairment charges) of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar, either by their nature or by their use in the operations of a company.

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Sum of the carrying amounts (original costs for current and prior period additions adjusted for impairment, if any) as of the balance sheet date of intangible assets, excluding goodwill, having a projected indefinite period of benefit.

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

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Intangible Assets And Goodwill (Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified			3 Months Ended
	Sep. 30, 2011	Dec. 31, 2010	Mar. 31, 2011 Intangible Assets Associated With The Steleus And Iptelorg Acquisitions [Member] Purchased Technology [Member]	Sep. 30, 2011 Purchased Technology [Member]	Dec. 31, 2010 Purchased Technology [Member]	Sep. 30, 2011 Customer Relationships [Member]	Dec. 31, 2010 Customer Relationships [Member]	Sep. 30, 2011 Contract Backlog [Member]	Dec. 31, 2010 Contract Backlog [Member]	Sep. 30, 2011 Non-Compete Agreements [Member]	Dec. 31, 2010 Non-Compete Agreements [Member]	Sep. 30, 2011 IPR&D, With Finite Lives [Member]	Dec. 31, 2010 IPR&D, With Finite Lives [Member]	Sep. 30, 2011 Trademarks And Trade Names [Member]	Dec. 31, 2010 Trademarks And Trade Names [Member]	Sep. 30, 2011 IPR&D, With Indefinite Lives [Member]	Dec. 31, 2010 IPR&D, With Indefinite Lives [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible assets with finite lives, Gross	$ 132,546	$ 132,474		$ 98,870	$ 98,870	$ 18,800	$ 18,800	$ 7,500	$ 7,500	$ 4,380	$ 4,380	$ 2,450	$ 2,450	$ 1,240	$ 1,240
Intangible assets with finite lives, Accumulated Amortization	(68,723)	(40,690)		(50,535)	(30,126)	(7,306)	(3,929)	(7,195)	(4,879)	(3,058)	(1,415)	(516)	(148)	(577)	(267)
Intangible assets with finite lives, Net	63,823	91,784		48,335	68,744	11,494	14,871	305	2,621	1,322	2,965	1,934	2,302	663	973
Effect of exchange rate changes, Gross	(694)	(766)
Effect of exchange rate changes, Accumulated Amortization	464	74
Effect of exchange rate changes, Net	(230)	(692)
Total intangible assets with finite lives, Gross	132,546	132,474		98,870	98,870	18,800	18,800	7,500	7,500	4,380	4,380	2,450	2,450	1,240	1,240
Total intangible assets with finite lives, Net	63,823	91,784		48,335	68,744	11,494	14,871	305	2,621	1,322	2,965	1,934	2,302	663	973
IPR&D, with indefinite lives, Gross																461	461
IPR&D, with indefinite lives, Net																461	461
Total intangible assets, Gross	133,007	132,935
Total intangible assets, Net	$ 64,284	$ 92,245
Remaining weighted average life			3.75
Revised estimated useful life of finite lived intangible assets, years			1