Derivative Financial Instruments (Fair Value of Derivative Instruments as Recorded in Consolidated Balance Sheets) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Derivatives, Fair Value [Line Items]
Total derivatives not designated as hedging instruments, liability derivatives	$ 46	$ 14	$ 0
Derivatives Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Total derivatives designated as hedging instruments, asset derivatives	719	1,020	205
Total derivatives designated as hedging instruments, asset derivatives	0	0	227
Derivatives Designated as Hedging Instruments | Prepaid Expenses and Other
Derivatives, Fair Value [Line Items]
Interest rate swap agreements, asset derivatives	103	128	0
Foreign currency exchange contracts, asset derivatives	125	83	205
Derivatives Designated as Hedging Instruments | Other Noncurrent Assets
Derivatives, Fair Value [Line Items]
Interest rate swap agreements, asset derivatives	491	809	0
Derivatives Designated as Hedging Instruments | Other Current Liabilities
Derivatives, Fair Value [Line Items]
Interest rate swap agreements, liability derivatives	0	0	227
Foreign currency exchange contracts, liability derivatives	0	0	0
Not Designated as Hedging Instrument | Other Current Liabilities
Derivatives, Fair Value [Line Items]
Foreign currency exchange contracts, liability derivatives	$ 46	$ 14	$ 0