Consolidated Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Allowance for Credit Losses, Doubtful Accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 1,552	$ 1,321	$ 1,135
Charged to (Reduction of) Costs and Expenses	227	231	219
Deductions	681	0
Recoveries			33
Other		0	0
Balance at  End of Period	1,098	1,552	1,321
Valuation Allowance on Deferred Tax Assets
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	9,330	9,375	9,083
Charged to (Reduction of) Costs and Expenses	(1,612)	(111)	(593)
Deductions	0	0	0
Other	0	66	885
Balance at  End of Period	$ 7,718	$ 9,330	$ 9,375