Pension and Other Post Retirement Benefit Plans - Schedule of Net Periodic Benefit Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Retirement Benefits [Abstract]
Service cost	$ 39	$ 8	$ 10
Interest cost	2,975	2,816	3,353
Expected return on plan assets	(4,414)	(4,891)	(4,778)
Amortization of prior service cost	87	87	90
Amortization of net loss	404	287	1,218
Settlement loss recognized	0	0	761
Net periodic pension benefit cost	$ (909)	$ (1,693)	$ 654