Pension and Supplemental Executive Retirement Plans - Defined Benefit Plan Activity (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	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	98	88	294	264
Expected Return on Plan Assets	(102)	(93)	(306)	(279)
Amortization of Net Actuarial Loss	68	77	204	230
Amortization of Prior Service Cost	0	0	0	0
Net Periodic Benefit Cost	64	72	192	215
Contributions Paid	$ 90	$ 179	$ 270	$ 337