Employee Benefit Plans - Schedule of Amounts Expected to be Recognized in Net Periodic Benefit Cost (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)
Pension plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Prior service credit	$ 0
Net actuarial loss	350
Other postretirement benefits
Defined Benefit Plans and Other Postretirement Benefit Plans
Prior service credit	(16)
Net actuarial loss	$ 0