Pension and Supplemental Executive Retirement Plans - Defined Benefit Plan Activity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	May 31, 2014
Weighted average assumptions used to determine the benefit obligation
Discount rate used to re-measure pension obligation					4.46%
Components of net periodic pension cost
Service cost	$ 0	$ 0	$ 0	$ 0
Interest cost	91	98	182	196
Expected Return on Plan Assets	(109)	(102)	(218)	(204)
Amortization of Net Actuarial Loss	105	68	210	136
Amortization of Prior Service Cost	0	0	0	0
Net Periodic Benefit Cost	87	64	174	128
Contributions Paid	$ 119	$ 90	$ 468	$ 180