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Discontinued Operations (Narrative) (Details)	3 Months Ended				0 Months Ended	3 Months Ended	0 Months Ended
Discontinued Operations (Narrative) (Details)	Mar. 31, 2012 USD ($)	Apr. 02, 2011 USD ($)	Dec. 31, 2011 USD ($)	Aug. 03, 2011	Mar. 18, 2011 Navis, LLC [Member] USD ($)	Mar. 31, 2012 Navis, LLC [Member] USD ($)	Aug. 03, 2011 Proveo AG [Member] USD ($)	Aug. 03, 2011 Proveo AG [Member] EUR (€)
Receivable from previously escrowed funds						$ 13,790,000
Proceeds from the sale of business	13,790,000	164,008,000			188,588,000	13,790,000
Short term receivable from buyer	13,790,000		27,580,000
Gain (loss) recorded upon divestiture		67,213,000					(1,248,000)
Loan agreed to provide to the buyer								1,000,000
Loan, duration (years)				1
Loan, interest rate								6.50%
Tax benefits realized		$ 25,081,000					$ 13,308,000

Pretax gain (loss), not previously recognized and resulting from the sale of a business component, which is recognized at the date of sale. A gain (loss) reflects the amount by which the consideration received exceeds (is exceeded by) the net carrying amount (reflecting previous provisions for loss on disposal, if any) of the disposal group.

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- Definition

Tax expense or benefit on the gain (loss), not previously recognized and resulting from the sale of a business component, which is recognized at the date of sale. A gain (loss) reflects the amount by which the consideration received exceeds (is exceeded by) the net carrying amount (reflecting previous provisions for loss on disposal, if any) of the disposal group.

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