Derivative Instruments and Hedging Activities (Tables)

12 Months Ended

Dec. 31, 2011

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Gross Notional and Fair Value of Derivative Financial Instruments Location in Balance Sheet [Table Text Block]

The gross notional and fair value of derivative financial instruments in the Consolidated Balance Sheets were recorded as follows:

	December 31, 2011						December 31, 2010
	Gross Notional		Prepaid Expenses and Other Current Assets		Accrued Expenses and Other Liabilities		Gross Notional		Prepaid Expenses and Other Current Assets		Accrued Expenses and Other Liabilities
Foreign currency forward contract not designated as hedging instruments	$	64,451	$	—	$	364	$	68,788	$	—	$	424
Foreign currency forward contract designated as hedging instruments	$	42,373	$	—	$	4,046	$	30,701	$	440	$	—

Schedule of Other Derivatives Not Designated as Hedging Instruments, Statements of Financial Performance and Financial Position, Location [Table Text Block]

The before-tax effect of derivative instruments not designated as hedging instruments on the Consolidated Statements of Income were as follows:

	Gain (Loss) Recognized in Income on Derivative
		Year Ended December 31,
	Location	2011			2010		2009
Foreign exchange contracts not designated as hedges	Interest income and other, net	$	(1,175	)	$	3,074	$	4,297

Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Table Text Block]

The before-tax effect of derivative instruments in cash flow hedging on the Consolidated Statements of Income were as follows:

	Gain (Loss) Recognized in Other Comprehensive Income ("OCI") on Derivative (Effective Portion)					Gain (Loss) Reclassified from Accumulated OCI Into Income (Effective Portion)						Gain (Loss) Recognized in Income Derivative (Ineffective portion and Amount Excluded from Effectiveness Testing)
	Year Ended December 31,						Year Ended December 31,						Year Ended December 31,
	2011			2010		Location	2011			2010		Location	2011		2010
Foreign exchange contracts designated as hedges	$	(5,074	)	$	375	General and administration	$	(882	)	$	—	Interest income and other, net	$	1,380	$	65