Fair Value Measurement (Tables)

12 Months Ended

Dec. 31, 2012

Fair Value Disclosures [Abstract]

Fair Value of Assets and Liabilities Measured on Recurring Basis

The following tables provide the assets and liabilities carried at fair value and measured on a recurring basis:

				Fair Value Measurements at Reporting Date Using:
(in thousands)	December 31, 2012			Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)
Assets
Cash equivalents	$	206,979		$	206,979	$	—		$	—
Short-term investments	$	452		$	—	$	452		$	—
Liabilities
Contingent consideration	$	(6,436	)	$	—	$	—		$	(6,436	)
Deferred compensation	$	(1,394	)	$	—	$	—		$	(1,394	)
Foreign currency future	$	(240	)	$	—	$	(240	)	$	—

				Fair Value Measurements at Reporting Date Using:
(in thousands)	December 31, 2011			Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets
Cash equivalents	$	182,530		$	181,198	$	1,332	$	—
Short-term investments	$	576		$	—	$	576	$	—
Liabilities
Contingent consideration	$	(9,571	)	$	—	$	—	$	(9,571	)
Deferred compensation	$	(2,073	)	$	—	$	—	$	(2,073	)

Changes in Level 3 Liabilities Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs

The following table presents the changes during the year ended December 31, 2012 in the Company’s Level 3 liabilities for contingent consideration and deferred compensation that are measured at fair value on a recurring basis:

	Fair Value Measurement Using Significant Unobservable Inputs
(in thousands)	Contingent Consideration			Deferred Compensation
Balance as of January 1, 2012	$	9,571		$	2,073
Contingent payments	(3,288		)	(712		)
Interest expense included in earnings	153			33
Balance as of December 31, 2012	$	6,436		$	1,394