Allowance For Credit Losses - Activities In Allowance For Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance at beginning of year	$ 1,477	$ 3,469
Additions (reductions)	(126)	7
Write-offs		(1,811)
Balance at end of period	$ 1,351	$ 1,665