Employee Benefit Plans (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Pension Plan | Minimum
Pension and Other Postretirement Benefit Contributions
Requisite service period for receiving benefits under the plan	1 year
Supplemental Employee Retirement Plan (SERP)
Net periodic benefit cost (income) for the year:
Service cost	$ 22	$ 25
Interest cost	43	41
Net periodic benefit cost	$ 65	$ 66