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Employee Benefit Plans (Schedule of Amounts Recognized in Balance Sheet - SERP) (Details) - SERP [Member] - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Other assets - prepaid pension asset (liability) $ (6,802) $ (6,816)
Other assets (liabilities) 1,024 1,600
Total $ (5,778) $ (5,216)