Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
Balance at Beginning of Period		$ 312	$ 450	$ 747
Additions - Charged to Costs and Expenses	[1]	50	0	6
Additions - Charged to Other Accounts	[2]	0	0	0
Deductions	[3]	24	138	303
Balance at End of Period		338	312	450
SEC Schedule, 12-09, Allowance, Notes Receivable [Member]
Balance at Beginning of Period		0	0	0
Additions - Charged to Costs and Expenses	[1]	7,615	0	0
Additions - Charged to Other Accounts	[2]	0	0	0
Deductions	[3]	0	0	0
Balance at End of Period		7,615	0	0
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]
Balance at Beginning of Period		520	0	0
Additions - Charged to Costs and Expenses	[1]	1,175	520	0
Additions - Charged to Other Accounts	[2]	0	0	0
Deductions	[3]	0	0	0
Balance at End of Period		$ 1,695	$ 520	$ 0

[1] Amounts charged to selling and general expenses or provision for income taxes from continuing operations.

[2] Amounts charged to other accounts.

[3] Principally bad debts written off, net of recoveries.