Leases, Codification Topic 842 (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Other Long-term Investments	$ 3,027,000	$ 4,513,000
Lessee, Operating Lease, Liability, Payments, Due	1,858,000
Lessee, Operating Lease, Liability, Payments, Due Year Two	1,821,000
Lessee, Operating Lease, Liability, Payments, Due Year Three	1,886,000
Lessee, Operating Lease, Liability, Payments, Due Year Four	662,000
Lessee, Operating Lease, Liability, Payments, Due Year Five	337,000
Lessee, Operating Lease, Liability, Payments, Due after Year Five	606,000
Operating Lease, Payments	1,762,000	1,990,000	$ 2,091,000
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	(1,105,000)
Operating Lease, Liability	6,065,000	6,133,000
Operating Lease, Cost	1,682,000	1,655,000	2,033,000
Sublease Income	771,000	602,000	135,000
Operating Lease, Right-of-Use Asset	4,976,000	4,868,000
Operating Lease, Liability, Current	1,502,000	1,409,000
Operating Lease, Liability, Noncurrent	$ 4,563,000	$ 4,724,000
Operating Lease, Weighted Average Remaining Lease Term	4 years 1 month 6 days	4 years 1 month 6 days
Operating Lease, Weighted Average Discount Rate, Percent	5.60%	5.00%
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	$ 1,217,000	$ 0	$ 59,000
Operating Lease, Lease Income, Lease Payments	$ 7,170,000
Lessee, Operating Lease, Discount Rate	7.00%		5.00%
Rental Income, Nonoperating	$ 40,000