Other Liabilities (Narrative) (Details) - USD ($)		1 Months Ended	3 Months Ended		9 Months Ended		18 Months Ended
	Aug. 29, 2014	Feb. 28, 2018	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020	Dec. 31, 2019
Other Liabilities [Line Items]
Accrued pension liability	$ 7,500,000		$ 4,155,000		$ 4,155,000			$ 4,469,000
Service cost			0	$ 0	0	$ 0	$ 0
Interest cost			65,000	70,000	199,000	414,000
Actuarial loss (gain)			$ (52,000)	$ (52,000)	$ 155,000	$ 155,000
Discount rate			4.25%		4.25%
Discount term					15 years
Monthly estate payment amount			$ 57,000		$ 57,000
Discounted value			2,700,000		2,700,000
Accumulated prior service cost			3,100,000		$ 3,100,000
Accumulated prior service cost amortization period					15 years
Accrued pension costs included in other liabilities			$ 4,800,000		$ 4,800,000
Payment related to annuity		$ 2,400,000
Payment period					42 months
Benefit obligation, gross	10,200,000				$ 10,200,000
Supplemental Executive Retirement Plans [Member]
Other Liabilities [Line Items]
Accrued pension liability	$ 7,600,000