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Pension Plans (Narrative) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Compensation and Retirement Disclosure [Abstract]        
Net periodic pension cost (income) $ (162) $ (288) $ (325) $ (555)