Employee Benefit Plans (Cash Flows) (Details)	12 Months Ended
	Dec. 31, 2019 USD ($)
Pension benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2020	$ 1,545,000
2021	1,610,000
2022	854,000
2023	775,000
2024	822,000
2025-2029	3,128,000
Total	8,734,000
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
2020	11,000
2021	10,000
2022	9,000
2023	9,000
2024	8,000
2025-2029	26,000
Total	73,000
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)	1,000
Minimum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	10,000
Maximum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year	$ 15,000