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Pension and Other Post Retirement Benefit Plans - Schedule of Accumulated Benefit Obligation in Excess of Plan Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]    
Projected benefit obligation $ 4,357 $ 4,840
Accumulated benefit obligation $ 4,357 $ 4,840
Fair value of plan assets