Derivative Instruments (Tables)

12 Months Ended

Dec. 31, 2011

Derivative Instruments [Abstract]

Outstanding forward contracts

Currency	Amount
U.S. Dollar/Euro		3,790,000 U.S. Dollars
Japanese Yen/Euro		200,000,000 Japanese Yen

Information regarding the fair value of the forward contracts outstanding

	Asset Derivatives					Liability Derivatives
	Balance Sheet     Location	Fair Value				Balance Sheet Location	Fair Value
		December 31, 2011		December 31, 2010			December 31, 2011		December 31, 2010
Currency forward contracts	Prepaid expenses and other current assets	$	14	$	83	Accrued expenses	$	165	$	125

Information regarding the effect of the forward contracts, net of the underlying exposure, on the Consolidated Statements of Operations

	Location of Gain (Loss) Recognized in Income on Derivatives	Amount of Gain (Loss) Recognized In Income on Derivatives Year ended December 31,
		2011		2010		2009
Currency forward contracts	Foreign currency gain (loss)		$34	$	62	$	(526	)