Employee Benefit Plans - Schedule of Amounts Not Yet Recognized In Net Periodic Benefit Cost (Details) $ in Thousands	Dec. 31, 2016 USD ($)
Pension plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Prior service cost	$ 0
Net actuarial loss	10,398
Other postretirement benefits
Defined Benefit Plans and Other Postretirement Benefit Plans
Prior service cost	(23)
Net actuarial loss	$ (339)