Current Expected Credit Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Allowance for doubtful accounts rollforward
Beginning balance	$ 4,815	$ 5,181
Provision for current expected credit losses	4,019	342
Write-offs	(2,098)	(739)
Recoveries collected (net of expenses)	29	31
Ending balance	$ 6,765	$ 4,815