Fair Value Measurements (Schedule of (Losses)/Gains on Changes in Fair Value of Derivative Instruments) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Derivative Instruments, Gain (Loss) [Line Items]
(Losses)/gains recognized in income, net					$ 100		$ 300
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	193	[1]	(1,328)	[1]	405	[1]	(925)	[1]
Foreign Exchange Option [Member] | Other Expense [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
(Losses)/gains recognized in income, net	$ 117	[2]	$ 24	[2]	$ 118	[2]	$ 258	[2]

[1] Unrealized losses are recognized in Other comprehensive income, net of tax. This derivative was an effective hedge of interest rate cash flow risk for the three months ended June 30, 2012.

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