Schedule II - Valuation And Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Valuation And Qualifying Accounts [Abstract]
Balance at Beginning of Period	$ 4,095	$ 3,497	$ 3,632
Charged to Costs and Expenses	3,773	3,248	2,113
Deductions	1,829	2,650	2,248
Balance at End of Period	$ 6,039	$ 4,095	$ 3,497