Derivative Financial Instruments (Fair Value of Derivative Instruments as Recorded in Consolidated Balance Sheets) (Details) (Derivatives Designated as Hedging Instruments, USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Derivatives, Fair Value [Line Items]
Total derivatives designated as hedging instruments, asset derivatives	$ 756	$ 0	$ 0
Total derivatives designated as hedging instruments, asset derivatives	0	460	844
Prepaid Expenses and Other
Derivatives, Fair Value [Line Items]
Interest rate swap agreements, asset derivatives	80	0	0
Foreign currency exchange contracts, asset derivatives	111	0	0
Other Noncurrent Assets
Derivatives, Fair Value [Line Items]
Interest rate swap agreements, asset derivatives	565	0	0
Other Current Liabilities
Derivatives, Fair Value [Line Items]
Interest rate swap agreements, liability derivatives	0	456	685
Foreign currency exchange contracts, liability derivatives	$ 0	$ 4	$ 159