Pension and Other Post Retirement Benefit Plans - Schedule of Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Compensation and Retirement Disclosure [Abstract]
Service cost	$ 9	$ 55	$ 73
Interest cost	3,273	3,087	3,235
Expected return on plan assets	(4,508)	(4,471)	(4,467)
Amortization of prior service costs	79	64	81
Amortization of net loss	1,656	1,722	478
Net periodic pension (benefit) cost	$ 509	$ 457	$ (600)