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Fair Value Measurements and Derivative Instruments Reporting (Derivative instruments location and fair value amounts) (Details) - Not Designated as Hedging Instrument [Member]
$ in Thousands
Dec. 31, 2015
USD ($)
Derivatives, Fair Value [Line Items]  
Gross recognized Liabilites $ (194)
Gross Amounts Offset 0
Net Recognized Fair value Liabilities (194)
Interest Rate Swap - Current [Member] | Accrued Liabilities [Member]  
Derivatives, Fair Value [Line Items]  
Gross recognized Liabilites (86)
Gross Amounts Offset 0
Net Recognized Fair value Liabilities (86)
Interest Rate Swap - Non-Current [Member] | Taxes Payable and Other [Member]  
Derivatives, Fair Value [Line Items]  
Gross recognized Liabilites (108)
Gross Amounts Offset 0
Net Recognized Fair value Liabilities $ (108)