|
Financial Instruments and Risk Management (Balance Sheet Classification and Fair Value of Derivative Instruments) (Details) (Forward Contracts [Member], USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2012
|
Dec. 31, 2011
|
|---|---|---|
|
Not Designated as Hedging Instrument [Member] | Prepaid Expenses And Other Current Assets [Member]
|
||
| Derivatives, Fair Value [Line Items] | ||
| Fair value of derivative assets | $ 4,072 | $ 645 |
|
Not Designated as Hedging Instrument [Member] | Accrued Liabilities [Member]
|
||
| Derivatives, Fair Value [Line Items] | ||
| Fair value of derivative liabilities | 743 | 2,962 |
|
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Prepaid Expenses And Other Current Assets [Member]
|
||
| Derivatives, Fair Value [Line Items] | ||
| Fair value of derivative assets | 2,147 | 6,591 |
|
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Other Noncurrent Assets [Member]
|
||
| Derivatives, Fair Value [Line Items] | ||
| Fair value of derivative assets | 489 | 1,117 |
|
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Accrued Liabilities [Member]
|
||
| Derivatives, Fair Value [Line Items] | ||
| Fair value of derivative liabilities | 579 | 824 |
|
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Other Long Term Liabilities [Member]
|
||
| Derivatives, Fair Value [Line Items] | ||
| Fair value of derivative liabilities | $ 0 | $ 91 |