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Pension Plans (Details 1) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Amounts recognized in the consolidated balance sheets    
Accrued benefit liability—long term $ (8,484) $ (8,544)
Pension Benefits [Member]    
Amounts recognized in the consolidated balance sheets    
Accrued benefit liability—short term (112) (112)
Accrued benefit liability—long term (8,413) (8,470)
Net liability recognized at December 31 (8,525) (8,582)
Net actuarial loss (8,747) (8,902)
Net prior service cost (17) (25)
Accumulated other comprehensive loss pre-tax at December 31 $ (8,764) $ (8,927)