Employee Benefit Plans (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Pension Plan
Estimated future benefit payments
2020	$ 1,195,000
2021	1,263,000
2022	1,303,000
2023	1,309,000
2024	1,317,000
2025 - 2029	6,447,000
Total	$ 12,834,000
Assumptions used to determine the net periodic benefit cost:
Discount rate (as a percent)	4.30%	3.70%
Expected return on plan assets (as a percent)	7.25%	7.25%
Net periodic benefit cost (income) for the year:
Service cost	$ 164,000	$ 141,000
Interest cost	811,000	728,000
Expected return on plan assets	(1,217,000)	(1,204,000)
Amortization of prior service cost	5,000	5,000
Recognized actuarial loss	333,000	278,000
Net periodic benefit cost (income)	96,000	$ (52,000)
Estimated prior service cost and net actuarial loss that will be amortized from AOCI into net periodic pension benefit cost
Prior service cost	5,000
Net actuarial loss	337,000
Supplemental Employee Retirement Plan (SERP)
Estimated future benefit payments
2020	17,000
2021	8,639,000
2022	160,000
2023	149,000
2024	149,000
2025 - 2029	743,000
Total	$ 9,857,000
Assumptions used to determine the net periodic benefit cost:
Discount rate (as a percent)	5.02%	5.02%
Rate of compensation increase (as a percent)	5.00%	5.00%
Net periodic benefit cost (income) for the year:
Service cost	$ 84,000	$ 97,000
Interest cost	162,000	151,000
Net periodic benefit cost (income)	246,000	$ 248,000
Expected contribution
2019	$ 17,000