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Employee Benefit Plans, Schedule of Net Periodic Benefit Cost Not Yet Recognized (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Unamortized net actuarial loss $ (240) $ (192)  
Unamortized net actuarial loss (61) (478) $ 475
Deferred tax benefit at 35% 84 67  
Deferred tax benefit at 35% (5,902) (6,055)  
Net unrecognized post-retirement benefits included in accumulated other comprehensive income (loss) $ (156) $ (125)  
Accumulated other comprehensive income (loss)      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Unamortized net actuarial loss    
Deferred tax benefit at 35% $ 0    
Net unrecognized post-retirement benefits included in accumulated other comprehensive income (loss) $ 0