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Financial Instruments and Fair Values - Gain and Loss of Cash Flow Hedges (Details) - Designated as Hedging Instrument [Member] - Cash Flow Hedging [Member] - Interest Rate Swap [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Derivative Instruments, Gain (Loss) [Line Items]    
Amount of gain loss) recognized in other comprehensive income (loss) - effective portion $ (1,922) $ 0
Amount of gain (loss) reclassified from accumulated other comprehensive income (loss) into interest expense - effective portion 0 0
Amount of gain (loss) recognized in other Income/expense - ineffective portion $ 0 $ 0