Annual report pursuant to Section 13 and 15(d)

Financial Instruments - Fair Value of Financial Instruments by Balance Sheet Location (Details)

v2.4.0.6
Financial Instruments - Fair Value of Financial Instruments by Balance Sheet Location (Details) (Fair Value, Inputs, Level 2 [Member], Fair Value, Measurements, Recurring [Member], USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative Assets, Current $ 237 $ 1,951
Derivative Liabilities, Current 98 1,415
Prepaid Expenses and Other [Member]
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative Assets, Current   1,951
Other Current Liabilities [Member]
   
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative Liabilities, Current   $ 1,415