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Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2011

Fair Value Measurements

Fair values of financial and non-financial assets and liabilities

		Fair Value Measurements at December 31, 2011
		Total			Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
Short-term investments		$	133,848		$	133,848		$	—		$	—
Forward contracts		5,105			—			5,105			—
Total		$	138,953		$	133,848		$	5,105		$	—

		Fair Value Measurements at December 31, 2010
		Total			Quoted Prices in Active Markets for Identical Assets (Level 1)			Significant Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
Short-term investments		$	98,341		$	98,341		$	—		$	—
Contingent consideration payments		56,668			—			—			56,668
Total		$	155,009		$	98,341		$	—		$	56,668

Schedule of changes in fair value of Level 3 items

Balance at December 31, 2010		$	56,668
Accretion of discount on contingent consideration liabilities		1,145
Payment of contingent acquisition related obligations		(40,000		)
Change in contingent acquisition related obligations		(17,813		)
Balance at December 31, 2011		$	—

Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issuances, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability.

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