Other Liabilities (Narrative) (Details) - USD ($)		1 Months Ended	3 Months Ended		18 Months Ended
	Aug. 29, 2014	Feb. 28, 2018	Mar. 31, 2021	Mar. 31, 2020	Jun. 30, 2020	Dec. 31, 2020
Other Liabilities [Line Items]
Accrued pension liability	$ 7,500,000		$ 3,940,000			$ 4,048,000
Service cost			0	$ 0	$ 0
Interest cost			62,000	68,000
Actuarial loss (gain)			$ (52,000)	$ (52,000)
Discount rate			4.25%
Discount term			15 years
Monthly estate payment amount			$ 57,000
Discounted value			2,700,000
Accumulated prior service cost			$ 3,100,000
Accumulated prior service cost amortization period			15 years
Accrued pension costs included in other liabilities			$ 4,600,000
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