Fair Value Measurements (Schedule of (Losses)/Gains on Changes in Fair Value of Derivative Instruments) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011		Dec. 31, 2010
Derivative Instruments, Gain (Loss) [Line Items]
(Losses)/gains recognized in income, net	$ (600)		$ (200)
Hedge effectiveness, percent	100.00%
Interest Rate Swap [Member] | Other Comprehensive Income (Loss) [Member] | Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Losses)/gains recognized in other comprehensive income	(2,317)	[1]	(276)	[1]
Foreign Exchange Options [Member] | Other Expense, Net [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Losses)/gains recognized in income, net	(210)	[2]	(222)	[2]
Foreign Currency Contracts [Member] | Other Expense, Net [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Losses)/gains recognized in income, net	$ (383)	[2]		[2]

[1] Unrealized losses are recognized in Other comprehensive income, net of tax. This derivative was a 100% effective hedge of interest rate cash flow risk for the year ended December 31, 2011.

[2] Losses/(gains) are recognized in Other expense, net.