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Employee Benefit Plans (Details 3) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Compensation and Retirement Disclosure [Abstract]    
Prior service costs $ (285) $ (364)
Net accumulated actuarial net loss (2,723) (1,937)
Accumulated other comprehensive loss (3,008) (2,301)
Net periodic benefit cost in excess of cumulative employer contributions (3,724) (3,269)
Net amount recognized at December 31, balance sheet (6,732) (5,570)
Net gain (loss) arising during period (786) 5
Prior service cost amortization 79 79
Amortization of net actuarial loss 0 65
Total recognized in other comprehensive income (loss) (707) 149
Total recognized in net periodic pension cost and other comprehensive income $ 1,934 $ 1,242